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)
Initial terminal size is now explicitly passed through parameters, providing
better control. Session aborts now produce an error message on the screen.
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.
Implemented full screen operations in XMLTerm, although still buggy.
Commands like 'less', 'vi', and 'emacs -nw' now work in stand-alone xmlterm,
although scrolling is still messed up. Compiles with Feb21 tree.
