'diff' for Net::LDAP entries

[John B. <jj...@be...>]

Hi.

Attached is a gzipped patch which attempts to implement a ->diff() method
for Net::LDAP::Entry. There is a little POD in the patch too. Patch is
against vanilla 0.20.

The intention is that you can do things like:

	my $old_entry = ...read from LDAP server
	my $new_entry = ...read from LDIF

	my $diff_entry = $old_entry->diff( $new_entry );
	$diff_entry->update( $ldap_server );

The only benefit of this over an add/delete sequence is that it should
occur as one LDAP operation. Hence a power failure shouldn't leave you
with the potential embarassement of an entry missing from the server.

No attempt is made to reconcile changes in the DN - it just fails.

regards,

jb