added check: low_seqno cannot be greater than high_seqno
added check: low_seqno cannot be greater than high_seqno

Sanne/JGroups,ibrahimshbat/JGroups,belaban/JGroups,vjuranek/JGroups,TarantulaTechnology/JGroups,deepnarsay/JGroups,kedzie/JGroups,rpelisse/JGroups,slaskawi/JGroups,danberindei/JGroups,tristantarrant/JGroups,rvansa/JGroups,vjuranek/JGroups,rhusar/JGroups,pferraro/JGroups,pruivo/JGroups,TarantulaTechnology/JGroups,rvansa/JGroups,dimbleby/JGroups,pferraro/JGroups,slaskawi/JGroups,slaskawi/JGroups,pferraro/JGroups,Sanne/JGroups,ibrahimshbat/JGroups,pruivo/JGroups,belaban/JGroups,ligzy/JGroups,pruivo/JGroups,ligzy/JGroups,rpelisse/JGroups,rpelisse/JGroups,danberindei/JGroups,deepnarsay/JGroups,rhusar/JGroups,tristantarrant/JGroups,dimbleby/JGroups,ligzy/JGroups,belaban/JGroups,vjuranek/JGroups,Sanne/JGroups,rhusar/JGroups,deepnarsay/JGroups,dimbleby/JGroups,ibrahimshbat/JGroups,ibrahimshbat/JGroups,kedzie/JGroups,TarantulaTechnology/JGroups,kedzie/JGroups,danberindei/JGroups