Make Valid parameter optional in ConfigSettingChange() because it is also optional in ConfigObject->Set().
Make Valid parameter optional in ConfigSettingChange() because it is also optional in ConfigObject->Set().

rudy500/otrs,xhoy/otrs,s7design/otrs,rudy500/otrs,s7design/otrs,xhoy/otrs,s7design/otrs,xhoy/otrs,MBRG/otrs,MBRG/otrs,MBRG/otrs,s7design/otrs,rudy500/otrs,mburggraf/otrs,xhoy/otrs,MBRG/otrs,mburggraf/otrs,mburggraf/otrs,rudy500/otrs,xhoy/otrs,rudy500/otrs,mburggraf/otrs,s7design/otrs,mburggraf/otrs,MBRG/otrs