XMLterm changes only.
Major restructuring of the xmlterm build process. Split lineterm from xmlterm.
IDLified all interfaces (bug 69002). Eliminated printing to console in opt
builds (bug 78641)
Made changes to lineterm, especially the PTY code, to get it to compile on
FreeBSD (bug 32923). Now it does compile and run on FreeBSD. There still a few
glitches though; PTY resizing fails in FreeBSD, for example.
Changed Makefile so that xmlterm compiles only on Linux and Solaris.
On other platforms, compilation is skipped even if the extension is enabled.
(People have been trying to compile xmlterm on Neutrino and FreeBSD and
reporting bustage.)