The actual reason, this port was broken was a bug in a recent version of
x11-toolkits/xforms. That bug was fixed earlier today.

Make sure, this builds with both erroneous as well as corrected xforms.

Fix the problems with parallelized build -- by replacing the upstream's
rudimentary Imakefiles with a BSDmakefile. Relocate application's help-
files into DOCSDIR.

Fix compiler warnings up to WARNS=3 and a few genuine (if ancient) bugs,
that this process revealed. Bump PORTREVISION and unbreak.