Analogous to the bug I just fixed in xtruss: in the loop that tries to
find a reasonable port number for an X display, the sense of the
(horrible) strcmp distinguishing EADDRINUSE from other socket errors
was backwards.
This gets rid of all those annoying 'win', 'ux' and 'gtk' prefixes
which made filenames annoying to type and to tab-complete. Also, as
with my other recent renaming sprees, I've taken the opportunity to
expand and clarify some of the names so that they're not such cryptic
abbreviations.
