replacements for regcmp/regex in PW?

[Guy Harris]

> Were regcmp or regex in PWB replaced by newer functions in 5.3?  I've
> heard this, but I don't know if it's true,

It's not.

"-lPW" is the same old cruft that it always was (other than some minor cleanups
and an AT&T copyright stuck at the front).

The correct way to do regular expression stuff in S5 is with <regexp.h>; that
has been around since S5"R1", at least.