K 10
svn:author
V 7
git2svn
K 8
svn:date
V 27
2023-11-08T01:11:09.564734Z
K 7
svn:log
V 716
regcomp: use unsigned char when testing for escapes

- cast GETNEXT to unsigned where it is being promoted to int to prevent
  sign-extension (really it would have been better for PEEK*() and
  GETNEXT() to return unsigned char; this would have removed a ton of
  (uch) casts, but it is too intrusive for now).
- fix an isalpha that should have been iswalpha

PR:		264275, 274032
Reviewed by:	kevans, eugen (previous version)
Obtained from:	NetBSD

(cherry picked from commit 3fb80f1476c7776f04ba7ef6d08397cef6abcfb0)
(cherry picked from commit 56b09feb23d98fcd0c4aed8d4f907a5a2f6b5ea9)

Approved by:	so
Security:	FreeBSD-EN-23:14

Git Hash:   5e0387e2ec6ed9b14b3c6088c19079db15a52eae
Git Author: christos@NetBSD.org
END