Added system settings option to remove campaign lock on agent only callbacks

git-svn-id: svn://192.168.202.10@1112 3d104415-ff17-0410-8863-d5cf3c621b8a

extras/upgrade_2.2.0.sql

@@ -80,3 +80,10 @@ ALTER TABLE vicidial_inbound_dids ADD menu_id VARCHAR(50) default '';
 
 UPDATE system_settings SET db_schema_version='1140';
 
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+ALTER TABLE system_settings ADD agentonly_callback_campaign_lock ENUM('0','1') default '1';
+
+UPDATE system_settings SET db_schema_version='1141';