Log Message:
security/vault: Update to 0.10.0.

SECURITY:

- Log sanitization for Combined Database Secret Engine: In certain failure
  scenarios with incorrectly formatted connection urls, the raw connection
  errors were being returned to the user with the configured database
  credentials. Errors are now sanitized before being returned to the user.

DEPRECATIONS/CHANGES:

- Database plugin compatibility: The database plugin interface was enhanced to
  support some additional functionality related to root credential rotation
  and supporting templated URL strings. The changes were made in a
  backwards-compatible way and all builtin plugins were updated with the new
  features. Custom plugins not built into Vault will need to be upgraded to
  support templated URL strings and root rotation. Additionally, the
  Initialize method was deprecated in favor of a new Init method that supports
  configuration modifications that occur in the plugin back to the primary
  data store.
- Removal of returned secret information: For a long time Vault has returned
  configuration given to various secret engines and auth methods with secret
  values (such as secret API keys or passwords) still intact, and with a
  warning to the user on write that anyone with read access could see the
  secret. This was mostly done to make it easy for tools like Terraform to
  judge whether state had drifted. However, it also feels quite un-Vault-y to
  do this and we've never felt very comfortable doing so. In 0.10 we have gone
  through and removed this behavior from the various backends; fields which
  contained secret values are simply no longer returned on read. We are
  working with the Terraform team to make changes to their provider to
  accommodate this as best as possible, and users of other tools may have to
  make adjustments, but in the end we felt that the ends did not justify the
  means and we needed to prioritize security over operational convenience.
- LDAP auth method case sensitivity: We now treat usernames and groups
  configured locally for policy assignment in a case insensitive fashion by
  default. Existing configurations will continue to work as they do now;
  however, the next time a configuration is written `case_sensitive_names`
  will need to be explicitly set to `true`.
- TTL handling within core: All lease TTL handling has been centralized within
  the core of Vault to ensure consistency across all backends. Since this was
  previously delegated to individual backends, there may be some slight
  differences in TTLs generated from some backends.
- Removal of default `secret/` mount: In 0.12 we will stop mounting `secret/`
  by default at initialization time (it will still be available in `dev`
  mode).

FEATURES:

- OSS UI: The Vault UI is now fully open-source. Similarly to the CLI, some
  features are only available with a supporting version of Vault, but the code
  base is entirely open.
- Versioned K/V: The `kv` backend has been completely revamped, featuring
  flexible versioning of values, check-and-set protections, and more. A new
  `vault kv` subcommand allows friendly interactions with it. Existing mounts
  of the `kv` backend can be upgraded to the new versioned mode (downgrades
  are not currently supported). The old "passthrough" mode is still the
  default for new mounts; versioning can be turned on by setting the
  `-version=2` flag for the `vault secrets enable` command.
- Database Root Credential Rotation: Database configurations can now rotate
  their own configured admin/root credentials, allowing configured credentials
  for a database connection to be rotated immediately after sending them into
  Vault, invalidating the old credentials and ensuring only Vault knows the
  actual valid values.
- Azure Authentication Plugin: There is now a plugin (pulled in to Vault) that
  allows authenticating Azure machines to Vault using Azure's Managed Service
  Identity credentials. See the [plugin
  repository](https://github.com/hashicorp/vault-plugin-auth-azure) for more
  information.
- GCP Secrets Plugin: There is now a plugin (pulled in to Vault) that allows
  generating secrets to allow access to GCP. See the [plugin
  repository](https://github.com/hashicorp/vault-plugin-secrets-gcp) for more
  information.
- Selective Audit HMACing of Request and Response Data Keys: HMACing in audit
  logs can be turned off for specific keys in the request input map and
  response `data` map on a per-mount basis.
- Passthrough Request Headers: Request headers can now be selectively passed
  through to backends on a per-mount basis. This is useful in various cases
  when plugins are interacting with external services.
- HA for Google Cloud Storage: The GCS storage type now supports HA.
- UI support for identity: Add and edit entities, groups, and their associated
  aliases.
- UI auth method support: Enable, disable, and configure all of the built-in
  authentication methods.
- UI (Enterprise): View and edit Sentinel policies.

IMPROVEMENTS:

- core: Centralize TTL generation for leases in core
- identity: API to update group-alias by ID
- secret/cassandra: Update Cassandra storage delete function to not use batch
  operations
- storage/mysql: Allow setting max idle connections and connection lifetime

- storage/gcs: Add HA support
- ui: Add Nomad to the list of available secret engines
- ui: Adds ability to set static headers to be returned by the UI

BUG FIXES:

- api: Fix retries not working
- auth/gcp: Invalidate clients on config change
- auth/token: Revoke-orphan and tidy operations now correctly cleans up the
  parent prefix entry in the underlying storage backend. These operations also
  mark corresponding child tokens as orphans by removing the parent/secondary
  index from the entries.
- command: Re-add `-mfa` flag and migrate to OSS binary
- core: Fix issue occurring from mounting two auth backends with the same path
  with one mount having `auth/` in front
- mfa: Invalidation of MFA configurations (Enterprise)
- replication: Fix a panic on some non-64-bit platforms
- replication: Fix invalidation of policies on performance secondaries
- secret/pki: When tidying if a value is unexpectedly nil, delete it and move
  on
- storage/s3: Fix panic if S3 returns no Content-Length header
- ui: Fixed an issue where the UI was checking incorrect paths when operating
  on transit keys. Capabilities are now checked when attempting to encrypt /
  decrypt, etc.
- ui: Fixed IE 11 layout issues and JS errors that would stop the application
  from running.
- ui: Fixed the link that gets rendered when a user doesn't have permissions
  to view the root of a secret engine. The link now sends them back to the list
  of secret engines.
- replication: Fix issue with DR secondaries when using mount specified local
  paths.
- cli: Fix an issue where generating a dr operation token would not output the
  token