RENAMEF bugs

[JONL at MIT-ML (Jon L White)]

Mergeing of new non-ITS code for RENAMEF buggified the ITS version,
but this has been corrected as follows:
1) (RENAMEF '|EXISTING FILE| '|NON-EXISTING FILE|) where the
   first arg is not an open file array, but a namelist or namestring
   was randomly merging with some code assuming that first arg was
   a file array; patched on ITS dumped versions, and being corrected
   in the source for TOPS-10 versions.
2) (RENAMEF '|NON-EXISTING FILE| '|ANY NAME|)  as well as
   (RENAMEF closed-file-array '|ANY NAME|)   was merging into a
   code-sequence common with the non-ITS versions at a point
   just before the "release-interrupt-lockout" and ocasionally
   causing a bomb-out to DDT; an ITS-only problem, now patched.
3) RENAMEF was incorrectly clobbering the TRUENAME of the file
   array it was being applied to; patched on ITS dumped versions, 
   and being corrected in the source for TOPS-10 versions.