DG/UX R4.20MU05 port of 2.3.0p1

[David Dulek]

DG/UX does not impliment the regcomp, regexec functions.  They suggest using 
regex and regcmp.  The only place that I see that regexec and regcomp are 
used is in compat.c.  Can someone help me out with the difference between 
regex and regexec and the differences between regcmp and regex.  This should 
also help any other OS that does not have regexec.

-- 

Dave Dulek