Ignore admin user in external LDAP

as it's already excluded in Zimbra

zmldapsync/zmldapsync.pl

@@ -314,6 +314,11 @@ DOMAIN: foreach my $domain ( keys $conf->{domains} ) {
   # or which exist in both but need to be updated
   foreach my $user ( keys $ext_users ) {
     my $attrs = '';
+    # Ignore admin
+    if ( $user eq 'admin' ) {
+      log_verbose( "Skiping admin user");
+      next;
+    }
     if ( defined $zim_users->{$user} ) {
 
       # User exists in Zimbra, lets check its attribute are up to date
@@ -819,7 +824,7 @@ sub zim_attr_value {
 
 # Take an alias and a domain. Return 1 if the alias is member of this domain (or one of the domain aliases)
 sub alias_matches_domain {
-  my $alias = shift;
+  my $alias  = shift;
   my $domain = shift;
   return 1 if ( $alias =~ m/\@$domain->{zimbraDomainName}$/ );
   foreach my $dom ( @{ $domain->{zimbraDomainAliases} } ) {