Signaled sockets forward a signal to their server counterparts,

which interrupt the server's socket thread, deleted when the socket close.
IPC message trace now reports message name instead of hexa opcode, which
increase a little their usefullness for an human reader :-)


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@5715 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/net/userland_ipc.h

@@ -45,6 +45,7 @@ typedef struct {
 typedef struct {
 	port_id	port;
 	area_id area;
+	thread_id socket_thread;
 
 	sem_id	commandSemaphore;	// command queue
 	uint32	numCommands,bufferSize;