Change the username requirements to match the other Arch sites
The username requirements for the AUR site are requiring the username to be between 3 and 16 characters (visible here). This limit is less than the other Arch sites (the wiki, the GitLab, and the forum). This disallow people having an usual username with more than 16 characters to use it across all Arch sites.
For reference, the limits on other Arch sites are the following:
- Forum: between 2 and 25 characters long
- wiki: less than 235 bytes long
- GitLab: between 2 and 255 characters long
From what I understand from this file, the field for usernames inside the db is currently set to 32 characters. My proposition is to raise it to 25 characters (to match the limit of the forum), without having to change the db schema. The lower limit may also be lowered to 2 to match the forum limits once again.