Log message:
rclone: Update to 1.52.0

pkgsrc changes:
 - Update patches due file renames

Changes:
1.52.0
------
Special thanks to Martin Michlmayr for proof reading and correcting all
the docs and Edward Barker for helping re-write the front page.

* New backends
  * Tardigrade backend for use with storj.io (Caleb Case)
  * Union re-write to have multiple writable remotes (Max Sum)
  * Seafile for Seafile server (Fred @creativeprojects)
* New commands
  * backend: command for backend specific commands (see backends)
    (Nick Craig-Wood)
  * cachestats: Deprecate in favour of `rclone backend stats cache:`
    (Nick Craig-Wood)
  * dbhashsum: Deprecate in favour of `rclone hashsum DropboxHash` (Nick Craig-Wood)
* New Features
  * Add `--header-download` and `--header-upload` flags for setting
    HTTP headers when uploading/downloading (Tim Gallant)
  * Add `--header` flag to add HTTP headers to every HTTP transaction
    (Nick Craig-Wood)
  * Add `--check-first` to do all checking before starting transfers
    (Nick Craig-Wood)
  * Add `--track-renames-strategy` for configurable matching criteria for
    `--track-renames` (Bernd Schoolmann)
  * Add `--cutoff-mode` hard,soft,catious (Shing Kit Chan & Franklyn Tackitt)
  * Filter flags (eg `--files-from -`) can read from stdin (fishbullet)
  * Add `--error-on-no-transfer` option (Jon Fautley)
  * Implement `--order-by xxx,mixed` for copying some small and some big
    files (Nick Craig-Wood)
  * Allow `--max-backlog` to be negative meaning as large as possible
    (Nick Craig-Wood)
  * Added `--no-unicode-normalization` flag to allow Unicode filenames to
    remain unique (Ben Zenker)
  * Allow `--min-age`/`--max-age` to take a date as well as a duration
    (Nick Craig-Wood)
  * Add rename statistics for file and directory renames (Nick Craig-Wood)
  * Add statistics output to JSON log (reddi)
  * Make stats be printed on non-zero exit code (Nick Craig-Wood)
  * When running `--password-command` allow use of stdin (Sébastien Gross)
  * Stop empty strings being a valid remote path (Nick Craig-Wood)
  * accounting: support WriterTo for less memory copying (Nick Craig-Wood)
  * build
     * Update to use go1.14 for the build (Nick Craig-Wood)
     * Add `-trimpath` to release build for reproduceable builds
       (Nick Craig-Wood)
     * Remove GOOS and GOARCH from Dockerfile (Brandon Philips)
  * config
     * Fsync the config file after writing to save more reliably
       (Nick Craig-Wood)
     * Add `--obscure` and `--no-obscure` flags to `config create`/`update`
       (Nick Craig-Wood)
     * Make `config show` take `remote:` as well as `remote` (Nick Craig-Wood)
  * copyurl: Add `--no-clobber` flag (Denis)
  * delete: Added `--rmdirs` flag to delete directories as well (Kush)
  * filter: Added `--files-from-raw` flag (Ankur Gupta)
  * genautocomplete: Add support for fish shell (Matan Rosenberg)
  * log: Add support for syslog LOCAL facilities (Patryk Jakuszew)
  * lsjson: Add `--hash-type` parameter and use it in lsf to speed up
    hashing (Nick Craig-Wood)
  * rc
     * Add `-o`/`--opt` and `-a`/`--arg` for more structured input
       (Nick Craig-Wood)
     * Implement `backend/command` for running backend specific commands
       remotely (Nick Craig-Wood)
     * Add `mount/mount` command for starting `rclone mount` via the
       API (Chaitanya)
  * rcd: Add Prometheus metrics support (Gary Kim)
  * serve http
     * Added a `--template` flag for user defined markup (calistri)
     * Add Last-Modified headers to files and directories (Nick Craig-Wood)
  * serve sftp: Add support for multiple host keys by repeating `--key` flag
    (Maxime Suret)
  * touch: Add `--localtime` flag to make `--timestamp` localtime not UTC
    (Nick Craig-Wood)
* Bug Fixes
  * accounting
     * Restore "Max number of stats groups reached" log line (Michał \ 
Matczuk)
     * Correct exitcode on Transfer Limit Exceeded flag. (Anuar Serdaliyev)
     * Reset bytes read during copy retry (Ankur Gupta)
     * Fix race clearing stats (Nick Craig-Wood)
  * copy: Only create empty directories when they don't exist on the remote
    (Ishuah Kariuki)
  * dedupe: Stop dedupe deleting files with identical IDs (Nick Craig-Wood)
  * oauth
     * Use custom http client so that `--no-check-certificate` is honored by
       oauth token fetch (Mark Spieth)
     * Replace deprecated oauth2.NoContext (Lars Lehtonen)
  * operations
     * Fix setting the timestamp on Windows for multithread copy
       (Nick Craig-Wood)
     * Make rcat obey `--ignore-checksum` (Nick Craig-Wood)
     * Make `--max-transfer` more accurate (Nick Craig-Wood)
  * rc
     * Fix dropped error (Lars Lehtonen)
     * Fix misplaced http server config (Xiaoxing Ye)
     * Disable duplicate log (ElonH)
  * serve dlna
     * Cds: don't specify childCount at all when unknown (Dan Walters)
     * Cds: use modification time as date in dlna metadata (Dan Walters)
  * serve restic: Fix tests after restic project removed vendoring
    (Nick Craig-Wood)
  * sync
     * Fix incorrect "nothing to transfer" message using `--delete-before`
       (Nick Craig-Wood)
     * Only create empty directories when they don't exist on the remote
       (Ishuah Kariuki)
* Mount
  * Add `--async-read` flag to disable asynchronous reads (Nick Craig-Wood)
  * Ignore `--allow-root` flag with a warning as it has been removed upstream
    (Nick Craig-Wood)
  * Warn if `--allow-non-empty` used on Windows and clarify docs
    (Nick Craig-Wood)
  * Constrain to go1.13 or above otherwise bazil.org/fuse fails to compile
    (Nick Craig-Wood)
  * Fix fail because of too long volume name (evileye)
  * Report 1PB free for unknown disk sizes (Nick Craig-Wood)
  * Map more rclone errors into file systems errors (Nick Craig-Wood)
  * Fix disappearing cwd problem (Nick Craig-Wood)
  * Use ReaddirPlus on Windows to improve directory listing performance (Nick \ 
Craig-Wood)
  * Send a hint as to whether the filesystem is case insensitive or not (Nick \ 
Craig-Wood)
  * Add rc command `mount/types` (Nick Craig-Wood)
  * Change maximum leaf name length to 1024 bytes (Nick Craig-Wood)
* VFS
  * Add `--vfs-read-wait` and `--vfs-write-wait` flags to control time
    waiting for a sequential read/write (Nick Craig-Wood)
  * Change default `--vfs-read-wait` to 20ms (it was 5ms and not configurable)
    (Nick Craig-Wood)
  * Make `df` output more consistent on a rclone mount. (Yves G)
  * Report 1PB free for unknown disk sizes (Nick Craig-Wood)
  * Fix race condition caused by unlocked reading of Dir.path (Nick Craig-Wood)
  * Make File lock and Dir lock not overlap to avoid deadlock (Nick Craig-Wood)
  * Implement lock ordering between File and Dir to eliminate deadlocks
    (Nick Craig-Wood)
  * Factor the vfs cache into its own package (Nick Craig-Wood)
  * Pin the Fs in use in the Fs cache (Nick Craig-Wood)
  * Add SetSys() methods to Node to allow caching stuff on a node
    (Nick Craig-Wood)
  * Ignore file not found errors from Hash in Read.Release (Nick Craig-Wood)
  * Fix hang in read wait code (Nick Craig-Wood)
* Local
  * Speed up multi thread downloads by using sparse files on Windows
    (Nick Craig-Wood)
  * Implement `--local-no-sparse` flag for disabling sparse files
    (Nick Craig-Wood)
  * Implement `rclone backend noop` for testing purposes (Nick Craig-Wood)
  * Fix "file not found" errors on post transfer Hash calculation
    (Nick Craig-Wood)
* Cache
  * Implement `rclone backend stats` command (Nick Craig-Wood)
  * Fix Server Side Copy with Temp Upload (Brandon McNama)
  * Remove Unused Functions (Lars Lehtonen)
  * Disable race tests until bbolt is fixed (Nick Craig-Wood)
  * Move methods used for testing into test file (greatroar)
  * Add Pin and Unpin and canonicalised lookup (Nick Craig-Wood)
  * Use proper import path go.etcd.io/bbolt (Robert-André Mauchin)
* Crypt
  * Calculate hashes for uploads from local disk (Nick Craig-Wood)
      * This allows crypted Jottacloud uploads without using local disk
      * This means crypted s3/b2 uploads will now have hashes
  * Added `rclone backend decode`/`encode` commands to replicate functionality
    of `cryptdecode` (Anagh Kumar Baranwal)
  * Get rid of the unused Cipher interface as it obfuscated the code
    (Nick Craig-Wood)
* Azure Blob
  * Implement streaming of unknown sized files so `rcat` is now supported
    (Nick Craig-Wood)
  * Implement memory pooling to control memory use (Nick Craig-Wood)
  * Add `--azureblob-disable-checksum` flag (Nick Craig-Wood)
  * Retry `InvalidBlobOrBlock` error as it may indicate block concurrency
    problems (Nick Craig-Wood)
  * Remove unused `Object.parseTimeString()` (Lars Lehtonen)
  * Fix permission error on SAS URL limited to container (Nick Craig-Wood)
* B2
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Ignore directory markers at the root also (Nick Craig-Wood)
  * Force the case of the SHA1 to lowercase (Nick Craig-Wood)
  * Remove unused `largeUpload.clearUploadURL()` (Lars Lehtonen)
* Box
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Implement About to read size used (Nick Craig-Wood)
  * Add token renew function for jwt auth (David Bramwell)
  * Added support for interchangeable root folder for Box backend (Sunil Patra)
  * Remove unnecessary iat from jws claims (David)
* Drive
  * Follow shortcuts by default, skip with `--drive-skip-shortcuts`
    (Nick Craig-Wood)
  * Implement `rclone backend shortcut` command for creating shortcuts
    (Nick Craig-Wood)
  * Added `rclone backend` command to change `service_account_file` and
    `chunk_size` (Anagh Kumar Baranwal)
  * Fix missing files when using `--fast-list` and `--drive-shared-with-me`
    (Nick Craig-Wood)
  * Fix duplicate items when using `--drive-shared-with-me` (Nick Craig-Wood)
  * Extend `--drive-stop-on-upload-limit` to respond to
    `teamDriveFileLimitExceeded`. (harry)
  * Don't delete files with multiple parents to avoid data loss
    (Nick Craig-Wood)
  * Server side copy docs use default description if empty (Nick Craig-Wood)
* Dropbox
  * Make error insufficient space to be fatal (harry)
  * Add info about required redirect url (Elan Ruusamäe)
* Fichier
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Implement custom pacer to deal with the new rate limiting (buengese)
* FTP
  * Fix lockup when using concurrency limit on failed connections
    (Nick Craig-Wood)
  * Fix lockup on failed upload when using concurrency limit (Nick Craig-Wood)
  * Fix lockup on Close failures when using concurrency limit (Nick Craig-Wood)
  * Work around pureftp sending spurious 150 messages (Nick Craig-Wood)
* Google Cloud Storage
  * Add support for `--header-upload` and `--header-download` (Nick Craig-Wood)
  * Add `ARCHIVE` storage class to help (Adam Stroud)
  * Ignore directory markers at the root (Nick Craig-Wood)
* Googlephotos
  * Make the start year configurable (Daven)
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Create feature/favorites directory (Brandon Philips)
  * Fix "concurrent map write" error (Nick Craig-Wood)
  * Don't put an image in error message (Nick Craig-Wood)
* HTTP
  * Improved directory listing with new template from Caddy project (calisro)
* Jottacloud
  * Implement `--jottacloud-trashed-only` (buengese)
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Use `RawURLEncoding` when decoding base64 encoded login token (buengese)
  * Implement cleanup (buengese)
  * Update docs regarding cleanup, removed remains from old auth, and added
    warning about special mountpoints. (albertony)
* Mailru
  * Describe 2FA requirements (valery1707)
* Onedrive
  * Implement `--onedrive-server-side-across-configs` (Nick Craig-Wood)
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Fix occasional 416 errors on multipart uploads (Nick Craig-Wood)
  * Added maximum chunk size limit warning in the docs (Harry)
  * Fix missing drive on config (Nick Craig-Wood)
  * Make error `quotaLimitReached` to be fatal (harry)
* Opendrive
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
* Pcloud
  * Added support for interchangeable root folder for pCloud backend
    (Sunil Patra)
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Fix initial config "Auth state doesn't match" message (Nick Craig-Wood)
* Premiumizeme
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Prune unused functions (Lars Lehtonen)
* Putio
  * Add support for `--header-upload` and `--header-download` (Nick Craig-Wood)
  * Make downloading files use the rclone http Client (Nick Craig-Wood)
  * Fix parsing of remotes with leading and trailing / (Nick Craig-Wood)
* Qingstor
  * Make `rclone cleanup` remove pending multipart uploads older than 24h
    (Nick Craig-Wood)
  * Try harder to cancel failed multipart uploads (Nick Craig-Wood)
  * Prune `multiUploader.list()` (Lars Lehtonen)
  * Lint fix (Lars Lehtonen)
* S3
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Use memory pool for buffer allocations (Maciej Zimnoch)
  * Add SSE-C support for AWS, Ceph, and MinIO (Jack Anderson)
  * Fail fast multipart upload (Michał Matczuk)
  * Report errors on bucket creation (mkdir) correctly (Nick Craig-Wood)
  * Specify that Minio supports URL encoding in listings (Nick Craig-Wood)
  * Added 500 as retryErrorCode (Michał Matczuk)
  * Use `--low-level-retries` as the number of SDK retries
    (Aleksandar Janković)
  * Fix multipart abort context (Aleksandar Jankovic)
  * Replace deprecated `session.New()` with `session.NewSession()`
    (Lars Lehtonen)
  * Use the provided size parameter when allocating a new memory pool
    (Joachim Brandon LeBlanc)
  * Use rclone's low level retries instead of AWS SDK to fix listing retries
    (Nick Craig-Wood)
  * Ignore directory markers at the root also (Nick Craig-Wood)
  * Use single memory pool (Michał Matczuk)
  * Do not resize buf on put to memBuf (Michał Matczuk)
  * Improve docs for `--s3-disable-checksum` (Nick Craig-Wood)
  * Don't leak memory or tokens in edge cases for multipart upload
    (Nick Craig-Wood)
* Seafile
  * Implement 2FA (Fred)
* SFTP
  * Added `--sftp-pem-key` to support inline key files (calisro)
  * Fix post transfer copies failing with 0 size when using
    `set_modtime=false` (Nick Craig-Wood)
* Sharefile
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
* Sugarsync
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
* Swift
  * Add support for `--header-upload` and `--header-download` (Nick Craig-Wood)
  * Fix cosmetic issue in error message (Martin Michlmayr)
* Union
  * Implement multiple writable remotes (Max Sum)
  * Fix server-side copy (Max Sum)
  * Implement ListR (Max Sum)
  * Enable ListR when upstreams contain local (Max Sum)
* WebDAV
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)
  * Fix `X-OC-Mtime` header for Transip compatibility (Nick Craig-Wood)
  * Report full and consistent usage with `about` (Yves G)
* Yandex
  * Add support for `--header-upload` and `--header-download` (Tim Gallant)

Log message:
rclone: Import rclone-1.51.0 as net/rclone

Rclone is a command line program to sync files and directories to and from:

 Amazon Drive, Amazon S3, Backblaze B2, Box, Ceph, DigitalOcean Spaces,
 Dreamhost, Dropbox, FTP, Google Cloud Storage, Google Drive, HTTP, Hubic,
 Memset Memstore, Microsoft Azure Blob Storage, Microsoft OneDrive, Minio,
 Nextcloud, OVH, Openstack Swift, Oracle Cloud Storage, Owncloud, pCloud,
 put.io, QingStor, Rackspace Cloud Files, SFTP, Wasabi, WebDAV, Yandex Disk,
 The local filesystem

Features:

 - MD5/SHA1 hashes checked at all times for file integrity
 - Timestamps preserved on files
 - Partial syncs supported on a whole file basis
 - Copy mode to just copy new/changed files
 - Sync (one way) mode to make a directory identical
 - Check mode to check for file hash equality
 - Can sync to and from network, eg two different cloud accounts
 - Optional encryption (Crypt)
 - Optional cache (Cache)
 - Optional FUSE mount (rclone mount)

Packaged in pkgsrc-wip by myself and <yhardy>.