SHA1 support is contributed by Daniel J. Gregor <dj@gregor.com>
MD5 support is contributed by me <kurt@OpenLDAP.org>
Uses public domain MD5 routines
Uses ISC/IBM freely redistributable Base64 routines
SHA1 support requires external SHA1 routines
adds POSIX RegEx (and removes BSD re_comp/re_exec) support.
* POSIX RegEx is not currently included in the distribution, however
we will probably add Henry Spencer's REGEX library soon.
* ACL Group functionality is also included in this merge!