This is a rather large PR which updates the async branch to have all the
database methods as an async fn.

Some iter/map logic needed to be changed to a stream::iter().then(), but
besides that most changes were just adding async/await where needed.

Update to rocket 0.5 and made code async, missing updating all db calls, that are currently blocking

Increase length limit for email token generation

The current limit of 19 is an artifact of the implementation, which can be
easily rewritten in terms of a more general string generation function.
The new limit is 255 (max value of a `u8`); using a larger type would
probably be overkill.

Update web vault to 2.25.1 and rust base images to march rust-toolchain, the official rust images don't have nightly builds, so just use the latest

Merge branch 'fix/CVE-2022-21658' of https://github.com/dscottboggs/vaultwarden into dscottboggs-fix/CVE-2022-21658

Merge branch 'iamdoubz-feature-to-permissions-policy-patch' of https://github.com/iamdoubz/vaultwarden into iamdoubz-iamdoubz-feature-to-permissions-policy-patch

Merge branch 'fix-emergency-invite-register' of https://github.com/BlackDex/vaultwarden into BlackDex-fix-emergency-invite-register

Squashed commit of the following:

commit 1bdf1c7954e0731c95703d10118f3874ab5155d3
Merge: 8ba6e61f 7257251
Author: Daniel García <dani-garcia@users.noreply.github.com>
Date:   Sun Jan 23 23:40:17 2022 +0100

    Merge branch 'remove-bwrs' of https://github.com/RealOrangeOne/vaultwarden into RealOrangeOne-remove-bwrs

commit 7257251ecf23af18deb894e8f2e5519a15360c76
Author: Jake Howard <git@theorangeone.net>
Date:   Thu Jan 6 17:48:18 2022 +0000

    Use `or_else` to save potentially unnecessary function call

commit 40ae81dd3c43a596375d5bfdcc00053e786328cc
Author: Jake Howard <git@theorangeone.net>
Date:   Wed Jan 5 21:18:24 2022 +0000

    Move $BWRS_VERSION fallback into build.rs

commit 743ef74b307a662960f3ca1b9636f3608506516d
Author: Jake Howard <git@theorangeone.net>
Date:   Sat Jan 1 23:08:27 2022 +0000

    Revert "Add feature to enable use of `Option::or` in const context"

    This reverts commit fe8e043b8aaf77c083747bf11760f29b53df0bba.

    We want to run on stable soon, where these features are not supported

commit a1f0da638c8b6ba32209318b105bde1efdd47082
Author: Jake Howard <git@theorangeone.net>
Date:   Sat Jan 1 13:04:47 2022 +0000

    Rename web vault version file

    https://github.com/dani-garcia/bw_web_builds/pull/58

commit fe8e043b8aaf77c083747bf11760f29b53df0bba
Author: Jake Howard <git@theorangeone.net>
Date:   Sat Jan 1 12:56:44 2022 +0000

    Add feature to enable use of `Option::or` in const context

commit 687435c8b2b995e90bf6f0ee619bc305e37bc183
Author: Jake Howard <git@theorangeone.net>
Date:   Sat Jan 1 12:27:28 2022 +0000

    Continue to allow using `$BWRS_VERSION`

commit 8e2f708e5037db8071251c582ebaf1a97d8e5923
Author: Jake Howard <git@theorangeone.net>
Date:   Fri Dec 31 11:41:34 2021 +0000

    Remove references to "bwrs"

    The only remaining one is getting the version of the web vault, which requires coordinating with the web vault patching.

API key logins use a scope of `api`, not `api offline_access`. Since
`offline_access` is not requested, no `refresh_token` is returned either.

This is mainly useful for CLI-based login automation.

Convert old, soon to be defunct, Feature-Policy with its replacement Permissions-Policy

At least on Android, it seems the Bitwarden mobile client responds to
HTTP 307, but not to HTTP 308 for some reason.

If a new user gets invited it should check if the user is invited via
emergency access, if so, allow that user to register.

Fix issue with Bitwarden CLI.

Fixed issue #2154

Add config option to set the HTTP redirect code for external icons

The CLI seems to send a String instead of an Integer for the maximum access count.
It now accepts both types and converts it to an i32 in all cases.

Fixes #2196

For emergency access invitations we need to check if invites are
allowed, not if sign-ups are allowed.

The default code is 307 (temporary) to make it easier to test different icon
services, but once a service has been decided on, users should ideally switch
to using permanent redirects for cacheability.

Set `Expires` header when caching responses

Co-authored-by: Daniel García <dani-garcia@users.noreply.github.com>

Browsers are rather smart, but also dumb. This uses the `Expires` header
alongside `cache-control` to better prompt the browser to actually
cache.

Unfortunately, firefox still tries to "race" its own cache, in an
attempt to respond to requests faster, so still ends up making a bunch
of requests which could have been cached. Doesn't appear there's any way
around this.

Merge branch 'multi-db-dockers' of https://github.com/BlackDex/vaultwarden into BlackDex-multi-db-dockers

- Using my own rust-musl build containers we now support all database
types for both Debian and Alpine.
- Added new Alpine containers for armv6 and arm64/aarch64
- The Debian builds can also be done wihout dpkg magic stuff, probably
some fixes in Rust regarding linking (Or maybe OpenSSL or Diesel), in
any case, it works now without hacking dpkg and apt.
- Updated toolchain and crates