HawkServ was updated earlier today, here's the current changelog:

ADD: /ban # [name] now kick bans, same as /ban @ but with added kick
ADD: Typing // before a command will return in the single slash before the command. It will not execute the command and is used for display purposes only
ADD: Temporarally allow operators or higher to connect to full servers
ADD: /highlight [name] all to show 500,000 seconds
ADD: /highlight now has a shortcut of /h

CHANGE: Add alternate help strings to /undo depending on rank
CHANGE: Make the inbox notification delayed on login, and more noticable
CHANGE: The undo command for halfops or higher now supports "all" as a seconds input
CHANGE: Optimised hides opmessages to prevent spam
CHANGE: /highlight [name] 0 now does 24 hours instead of 30 minutes

FIX: Issue with /ban @'s undo actions not working correctly for Superops or higher
FIX: Issue with operators being able to summon higher ranks
FIX: Issue with hidden players still appearing in /players
FIX: Grammar mistakes in /banip
FIX: Grammar mistakes in /undo
FIX: Major memory leak caused by sockets remaining open
FIX: Issue with errors being displayed to all users
FIX: Mistake in /mutes opmessages
FIX: Issue with /hide not setting a global hidden variable

REMOVE: /hacks
REMOVE: /crashserver