Add labels for 'n' ACL (RFC 5257)

plugins/acl/localization/en_US.inc

@@ -40,6 +40,7 @@ $labels['aclt'] = 'Delete messages';
 $labels['acle'] = 'Expunge';
 $labels['aclx'] = 'Delete folder';
 $labels['acla'] = 'Administer';
+$labels['acln'] = 'Annotate messages';
 
 $labels['aclfull'] = 'Full control';
 $labels['aclother'] = 'Other';
@@ -60,6 +61,7 @@ $labels['shortaclt'] = 'Delete';
 $labels['shortacle'] = 'Expunge';
 $labels['shortaclx'] = 'Folder delete';
 $labels['shortacla'] = 'Administer';
+$labels['shortacln'] = 'Annotate';
 
 $labels['shortaclother'] = 'Other';
 $labels['shortaclread'] = 'Read';
@@ -79,6 +81,7 @@ $labels['longaclt'] = 'Messages Delete flag can be changed';
 $labels['longacle'] = 'Messages can be expunged';
 $labels['longaclx'] = 'The folder can be deleted or renamed';
 $labels['longacla'] = 'The folder access rights can be changed';
+$labels['longacln'] = 'Messages shared metadata (annotations) can be changed';
 
 $labels['longaclfull'] = 'Full control including folder administration';
 $labels['longaclread'] = 'The folder can be opened for reading';