ITS#1677 - cast away const warnings
ITS#1678 - unsigned char args to ctype funcs
ITS#1682 - don't redefine ldap_debug
ITS#1683 - uninitialized vars
ITS#1703 - ldo_debug initialization
ITS#1705 - unsigned testing
ITS#1706 - socklen_t args
ITS#1719 - back-tcl update (other cleanups/fixes/improvements; yet untested)
ITS#1724 - integerNormalize/integerFilter/integerIndexer bugs
ITS#1725 - libdes not required

Implement back-null (/dev/null style backend)
Cleanup some misc warnings ("%lu" format, unused/uninitialized vars,
        ambiguous operator precedence)

Kurt, please regenerate configure

fix non-printable flag detection; improve dn test (passes all but last in http://www.openldap.org/ietf/ldapbis/dn.txt)

Misc cleanup of other tests.
Add *.dsp files for tests

don't expose symbols of ava helper routines

liberally accept many LDAPv2/LDAPv3 stuff in DN (quoted parts, ';' as rdn separator and so); enforce exact case match of normalized dn in dnMatch (let's see what happens ...); fix a ldapava_free_rdn bug

reimplement dn_validate/normalize/(match) using the ldap_str2dn/dn2str stuff; need to #define USE_LDAP_DN_PARSING

moved rdn parsing in a dedicated routine, ldap_str2rdn(), that can be used directly; now ldap_rdn2str() handles all the formats

may need optimization;
uncomment #define USE_LDAP_DN_PARSING in libraries/libldap/getdn.c
to enable its use.
The ava/rdn/dn handling routines (append, insert, free and so) must
be made available thru declaration in some header.

enhanced dn parsing; see libraries/libldap/dntest for a 'demo'. Need to define USE_LDAP_DN_PARSING to override usual ldap_dn2ufn and so, and PARSE_UTF8 to parse attribute values as utf-8

skeleton of ldap_str2nd/dn2str; works with most of the simple cases, but there's much to do with unicode, I think