Improve modlog
Modlog is now separated by rooms and each room has its own independent
modlog file to be searched into.
The new syntax allows to search directly into the room's modlog, but also
allows you to input a room and add then the criteria after a comma to
find about other rooms's modlogs.
You can also search in all rooms at once using 'all' as roomid.

Usage:
/modlog - Searchs for last 100 lines on current room's modlog.
/modlog lines or word - Searches for lines lines or word into room's
modlog.
/modlog roomid, lines or word - Searches for lines lines or word into
roomid's modlog.
/modlog all, word - Searches for word onto all modlogs.