Adjustment for #393

git-svn-id: http://red5.googlecode.com/svn/java/server/trunk@4642 1b6495e4-3631-0410-8e05-8f51eee8b9cc
Fixed issue #246 and fixed keep-alive bug in RTMPConnection.

git-svn-id: http://red5.googlecode.com/svn/java/server/trunk@4643 1b6495e4-3631-0410-8e05-8f51eee8b9cc
Merge remote branch 'remotes/red5/trunk' into red5-r4643
 - build r4643