*
*	Diagnostic messages for the 'prs' command
*
-1
"nonexistent sid"
You specified an SID, via the r keyletter, which is not
an SID of the SCCS file.
-2
"curdir failed"
Try the command again. This may represent some
system problem if it persists.
-3
"cannot change directory"
If you get this message it is likely you have some
directory or file permissions set up incorrectly.
-4
"invalid cutoff date"
Either no cutoff date was specified, or the format of the
date was not intelligible.
-5
"can't specify cutoff date and SID"
It makes no since to ask for a specific sid and give a
cutoff date.
-6
"must specify -e or -l with -c"
You must say whether you want earlier or later deltas 
than the cutoff date.
