feat(preferences): Add SOGoCreateIdentitiesDisabled domain option which disables identity creation for users in preferences

SoObjects/SOGo/SOGoDomainDefaults.h

@@ -96,6 +96,8 @@
 
 - (NSDictionary *) mailJunkSettings;
 
+- (BOOL) createIdentitiesDisabled;
+
 @end
 
 #endif /* SOGODOMAINDEFAULTS_H */

SoObjects/SOGo/SOGoDomainDefaults.m

@@ -438,4 +438,9 @@
   return [self objectForKey: @"SOGoMailJunkSettings"];
 }
 
+- (BOOL) createIdentitiesDisabled
+{
+  return [self boolForKey: @"SOGoCreateIdentitiesDisabled"];
+}
+
 @end