Bug#346377: xterm: Now that manpages are in /usr/share/man, they should drop the .1x

[Nathanael Nerode <neroden@twcny.rr.com>]

Package: xterm
Version: 208-1
Severity: minor

Now that all the xterm manpages are installed in /usr/share/man/man1 instead
of in /usr/X11R6/man/man1, I believe they should drop the '1x' suffix and
revert to '.1'.  Right?

-- remove the appropriate part of debian/patches/901_xterm_manpage.diff
   (the part which changes it from '1' to '1x')
-- rename the three manpages in debian/local from .1x to .1
-- and change their internal references to remove the 'x'
-- remove the 'manext=1x' bit from the main "$(MAKE) install"
   line in debian/rules
-- fix all the references in debian/rules to the manpages in debian/local,
   so they refer to them by the correct names

I think this is all that needs to be done.