Issue 1544 based feature add

added N2K-based Name2Key (uses SL's internal search, instead of external
DBs) and ability to add users (and settings) to the Others list by name
or uuid. revamped the entire UserCommand section to change format to
"user:rlvthing=y" so that users can enter name of person to adjust once,
and stride a list of what settings to change (<prefix>ex Joe
Resident:recvim=n,sendchat=y:Jane Resident:recvim=n) as an example.
Added a "check" that requires "ex" for all exceptions commands, to
filter away things meant for other scripts early on. adjusted existing
menus & internal commands to the "ex " rule, removed the "s" from
secondowner for uniformity (between "owner" and "secowner" buttons &
chat commands). Naturally, the editor made several spacing changes
(which irritates the hell out of me, but are of no real consequence) on
the C&P.