Escape white space characters and `#' characters. Do the inverse
when reading specs.
This is a temporary fix until we have strzouvis(3) (or some such)
which is an improved version of strvis (taking an additional list
of characters to encode).
Fixes PR 5006 and PR 7663
checksum of the file in question, optionally preceeded by `0x'.
This has been tested, and does work, AFAICT. There is currently no md5 equivalent
of the '-s' flag for use with checksum.
specification, but _not_ in the file hierarchy. contrib'd by:
Ed Symanzik <zik@enoch.cl.msu.edu>. Man page adjustment to match, and
minor man page cleanup, by me.