Fix police spawning (Closes #2983)

It used an older version of the new-equipment API, and leaked onto the
Lua stack like crazy!
This commit also introduces LUA_DEBUG_* guards.
Fix BreakdownServicing (Closes #2982)

One should always check that one calls a Lua METHOD and not a simple
function. Damnit!
Remove the domain name info from the OSInfoString for Mac OS

It isn't available in their data structure, and it isn't a crucial info
anyway.