Added TCP keepalive to telnet and webclient, to make sure to (eventually) catch dead connections. Should help #498, but should test on demo before closing.

src/server/portal/telnet.py

@@ -50,6 +50,8 @@ class TelnetProtocol(Telnet, StatefulTelnetProtocol, Session):
         self.msdp = msdp.Msdp(self)
         # mxp support
         self.mxp = Mxp(self)
+        # keepalive watches for dead links
+        self.transport.setTcpKeepAlive(1)
         # add this new connection to sessionhandler so
         # the Server becomes aware of it.
         self.sessionhandler.connect(self)