Fix suggested by Peter Marshall <peter@adpm.de>

Slapadd treated these as separate, incorrect, entries.

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

Use AC_FMEMCPY where appropriate (-llber)

references, extended results, and extended partial results.  LDIF
extended to support these new features and reported version 2.
-L now limits output to LDIFv1 for compatibility reasons.  No
-L is now LDIFv2.  Old alternative form is no longer supported.

Use LDAP_TMPDIR (in ldap_config.h) instead of hardcoded /tmp
Use LDAP_FILE_URI_PREFIX (in ldap_config.h) instead of hardcoded
	file://tmp/

memalloc/memcpy instead of strdup

value was copied with ber_strdup.

Use BASE64 if attr-desc includes ";binary"

user password.  Likely to be modified to use bind control
instead.  Use of modify deprecated in favor mechanisms that
support passwords stored externally to the directory (such
as in a SASL service).
Modified slapd extended operation infrastructure to support
backend provided extended operations.

as an empty value.  Complain, of course, as this isn't valid LDIF.

Replace old Id as needed (back-tcl).
Leave updating of contribWare to contributors (for now).