Now they're done by putty.rc and puttytel.rc, before including
putty-common.rc2. So another user of putty-common.rc2 can disagree on
what icons to use.
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.
