REORG: use the name sock_raw instead of stream_sock

We'll soon have an SSL socket layer, and in order to ease the difference
between the two, we use the name "sock_raw" to designate the one which
directly talks to the sockets without any conversion.
diff --git a/src/proto_uxst.c b/src/proto_uxst.c
index 1a808ea..ace1e44 100644
--- a/src/proto_uxst.c
+++ b/src/proto_uxst.c
@@ -39,7 +39,7 @@
 #include <proto/log.h>
 #include <proto/protocols.h>
 #include <proto/proto_uxst.h>
-#include <proto/stream_sock.h>
+#include <proto/sock_raw.h>
 #include <proto/task.h>
 
 static int uxst_bind_listener(struct listener *listener, char *errmsg, int errlen);