removeMany() now returns null if no message can be removed
removeMany() now returns null if no message can be removed

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