We add clippy as our build — also rectifying the missing `plume-cli` build!
In the next step we follow clippy's advise and fix some of the "simple" mistakes in our code, such as style or map usage.
Finally, we refactor some hard bits that need extraction of new types, or refactoring of function call-types, especially those that thread thru macros, and, of course functions with ~15 parameters should probably be rethought.
* Password reset
* Various improvements and fixes for password reset
- Reorganize src/mail.rs to make it cleaner
- add a build_mail function
- only make the requests invalid after 2 hours
- avoid infintely-growing list of requests by deleting them once completed, or after 24 hours
- avoid sending many requests for the same user
- validate the password reset form
* Avoid locking so many times
Fix durations
* Remove old requests even if the current one is not valid
* Remove unused feature
* Also remove the custom_derive and plugin features while we are at it
* Forgot a 0 è_é
* Avoid panicking while owning a request lock
* Use master branch of lettre so that we can build with the latest OpenSSL
* Fix the debug mailer
