Summary: SCCS vs. RCS

[Guy Harris]

>make            understands SCCS*             does not understand RCS

There do exist versions of "make" that understand RCS, although
the vanilla S5 one doesn't have built-in RCS support the way it has
built-in SCCS support, and I don't think it's easy to add in without
source.  The SunOS 4.x "make" doesn't have built-in RCS support the way
it has built-in SCCS support, either, but you can add rules to help.

There also exist versions of "make" that don't understand SCCS....

>speed           retrieve old versions faster  retrieve latest version faster

WRONG.  Older versions are NOT faster in SCCS.  Didn't I say that in my
message?