Public domain "strings" command

[Mark Horton]

It was really nice of someone to rewrite strings so there would be a
public domain version, but the copy from Berkeley is already in the
public domain.  (It was written at Berkeley, it did not come with 32V.)

It would be nice to have one version that works both on 4BSD and System V.
(It seems that strings uses some handy macros that only Berkeley has that
tell about the headers of a.out files.)  It's possible to tell the difference
using ifdefs, based on, say, L_ctermid from stdio.h, or N_BADMAG from a.out.h.)