* Eliminate implicit calls to \FILEOUTCHARFN
Also, update DATE to modern readtable (don't know what it does), add LLETHER to EXPORTFILES in FILESETS (may also need the file that exports pup records).
* Further fixups for EXPORTFILES
also fixing/compiling PLAINTEXTSTREAM
* Remove garbage files DATE and PLAINTEXTSTREAM from checkin
Co-authored-by: Larry Masinter <LMM@acm.org>