Disable the auto camd35 disconnect when keepalive = 1

Camd35 always disconnected after 1 min 40 seconds with message rto with keepalive then it took 30 seconds before it reconnected.
Now when keep alive is used camd35 will not disconnect anymore with rto msg.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@9785 4b0bc96b-bc66-0410-9d44-ebda105a78c1