* Fixes#5061.
* Resolves the client crashing when attempting to retrieve all attachments from mail.
* Mail should not be marked as read after retrieving the attachments from them.
* Converts packets to new struct format.
Thanks to @admkakaroto and @attackjom!
* Fixes#2787 and fixes#3513.
* Resolved some format-truncation warnings.
* The remaining will be fixed at a later time.
Thanks to @RadianFord and @Lemongrass3110!
* Alphabetically sorted includes.
* Updated copyright and license text to match across all files.
* Removed pragma once define in header files in lieu of ifdef guards.
