since the same UID may be shared by multiple logins (yes, really!).
2) fix bug in ipcmMessageClientInfo::NextTarget().
git-svn-id: svn://10.0.0.236/trunk@133577 18797224-902f-48f8-a5cc-f745e15eee43
2) added ipcMessage primitives to simplify IPCM protocol implementation
3) added ipcMessageCast to simplify casting raw messages to specific types
4) added function table in ipcCommandModule
git-svn-id: svn://10.0.0.236/trunk@132815 18797224-902f-48f8-a5cc-f745e15eee43