added code that prevents reuse of previous ports used in the same session
added code that prevents reuse of previous ports used in the same session

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