Log message:
filesystems: Replace RMD160 checksums with BLAKE2s checksums

All checksums have been double-checked against existing RMD160 and
SHA512 hashes

Log message:
filesystems: Remove SHA1 hashes for distfiles

Log message:
*: recursive bump for libffi

Log message:
Update to 2.7:

* Integrated osxfuse's copy of sshfs, which means that sshfs now works
  on OS X out of the box.
* Added -o cache_max_size=N option to let users tune the maximum size of
  the cache in number of entries.
* Added -o cache_clean_interval=N and -o cache_min_clean_interval=N
  options to let users tune the cleaning behavior of the cache.

Log message:
Initial addition of fuse-sshfs, version 2.6:

This is a filesystem client based on the SSH File Transfer Protocol.
Since most SSH servers already support this protocol it is very easy to
set up: i.e. on the server side there's nothing to do.  On the client
side mounting the filesystem is as easy as logging into the server with
ssh.

The idea of sshfs was taken from the SSHFS filesystem distributed with
LUFS.  There were some limitations in that codebase, and this
implementation features:

- Based on FUSE
- Multithreading
- Large reads (max 64k)
- Caching directory contents
- Reconnect on failure