Fixed keepalive problem on older openssh servers

Conflicts:

	libssh/channels.c

libssh/channels.c

@@ -629,7 +629,7 @@ SSH_PACKET_CALLBACK(channel_rcv_request) {
 	if(strcmp(request,"keepalive@openssh.com")==0){
 	  SAFE_FREE(request);
 	  ssh_log(session, SSH_LOG_PROTOCOL,"Responding to Openssh's keepalive");
-	  buffer_add_u8(session->out_buffer, SSH2_MSG_CHANNEL_SUCCESS);
+	  buffer_add_u8(session->out_buffer, SSH2_MSG_CHANNEL_FAILURE);
 	  buffer_add_u32(session->out_buffer, htonl(channel->remote_channel));
 	  packet_send(session);
 	  leave_function();