etc., so that (this part of) `LIBOWN=... make world' can be run by users
other than root. Actually, use BINOWN instead of LIBOWN, since the files
that we install in /usr/libdata are not libraries, and LIBOWN is not
used for anything else in /usr/libdata.
Rewrote all the rules and cleaned up.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.