Revert "Remove listRequiresDot option from *Source classes"

This reverts commit 6b2ec7a2e7.

SoObjects/SOGo/SOGoSource.h

@@ -41,6 +41,10 @@
 
 - (NSString *) domain;
 
+/* requires a "." to obtain the full list of contacts */
+- (void) setListRequiresDot: (BOOL) aBool;
+- (BOOL) listRequiresDot;
+
 - (BOOL) checkLogin: (NSString *) _login
 	   password: (NSString *) _pwd
 	       perr: (SOGoPasswordPolicyError *) _perr