ref: don't subscribe when parent message is subscribed
ref: don't subscribe when parent message is subscribed

MatthiasApsel/cforum,MatthiasApsel/cforum,CountOrlok/cforum,CountOrlok/cforum,ckruse/cforum,CountOrlok/cforum,ckruse/cforum,MatthiasApsel/cforum,MatthiasApsel/cforum,ckruse/cforum,CountOrlok/cforum,ckruse/cforum