New-ish files 'engrave', 'epitaph', and 'bogusmon' added for 3.6.0
were not handled by playground setup. NetHack runs without them so
limited testing didn't notice.
Add 'makedefs -s' to build them and include them in installed files.
Also, remove 'makedefs -m' and obsolete monstr.c.
I hadn't tried the build script vmsbuild.com in a long time....
vmsbuild.com wasn't compiling src/sys.c;
vmsbuild.com and Makefile.src+Makefile.utl had some linking discrepancies;
Makefile.top, Makefile.dat, Makefile.doc - replace old SCCS id/date/rev
comment with current cvs one (done for .src & .utl a month or so back);
config1.h - running DEC C in VAX C compatability mode to test linking
yielded a diagnostic about signed in the schar typedef for every file.
Update the instructions, add a dat -> util dependency so that
MMK (freeware clone of DEC's MMS make utility) builds the data files
when necessary, and switch the default compiler to DEC C.
