that created the PerlInterpreter object (ITS#4751)

SASL mech removed from backend bind callback (as SASL is managed by frontend)
Changes to some backends are untested (as I don't have all dependent
  software install)

and back-ldbm are preserved, they only use the up-cased DNs. back-passwd
uses the mixed-case DN. All others are using mixed-case DN, may need more
fixing.

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

Includes support for update referral for each replicated backend.
	Reworked replication test to use update referral.
Includes major rewrite of response encoding codes (result.c).
Includes reworked alias support and eliminates old suffix alias codes
(can be emulated using named alias).
Includes (untested) support for the Manage DSA IT control.
Works in LDAPv2 world.  Still testing in LDAPv3 world.
Added default referral (test009) test.

Fix bug in compare.c where obj_ref to pb_obj_ref

Added call to perl "config" method so the the
perl module can have its own configuration
options.

Fix bug in init.c where the address of the be_private
object was being retrieved when it was already
a pointer.

Added the dn parameter to the modify.c call to the
modify method.  Not sure why this wasn't there
in the beginning.

Expects and array from the search method instead of
a scalar in search.c so that it can return search
results and a return code.

Added the demo file SampleLDAP.pm

	Likely broke things for non-posix threadings....

Update -lldap_r implementation to:
	remove attribute support
	hide thread detachment
	provide concurrency accessors
	provide initialization function
	fix gethostby{addr,name}_r codes (not coverred by HAVE_REENTRANT_FUNCTIONS)
Update servers/libraries to use ldap_pvt_thread_ calls.
Cleanup server codes (no #ifdef HAVE_PTHREAD_THIS or _THATs)!
Removed -llthread

John's still working on the 'perl-test' (the perl backend test module).