Make frozen crates uncollectable, add some tinting to frozen items. Suggestions needed for what should happen to explosives
'/rnd' command. Pass it a (possibly empty) list of items.
Allow messages containing word separators in server's additional console commands
Fix
issue #570 (GoBack() slot connected twice)
Clear nickname in case of collision so client could try again. Should help with
issue #550 if not fix it.
Rooms list/chat splitter from
issue #612