REORG: sock_raw: rename the files raw_sock*

The "raw_sock" prefix will be more convenient for naming functions as
it will be prefixed with the data layer and suffixed with the data
direction. So let's rename the files now to avoid any further confusion.

The #include directive was also removed from a number of files which do
not need it anymore.
diff --git a/src/backend.c b/src/backend.c
index f9cbaf2..d5c4a99 100644
--- a/src/backend.c
+++ b/src/backend.c
@@ -43,7 +43,7 @@
 #include <proto/queue.h>
 #include <proto/server.h>
 #include <proto/session.h>
-#include <proto/sock_raw.h>
+#include <proto/raw_sock.h>
 #include <proto/stream_interface.h>
 #include <proto/task.h>
 
@@ -988,9 +988,9 @@
 		stream_interface_prepare(s->req->cons, target_srv(&s->target)->sock);
 	}
 	else if (s->target.type == TARG_TYPE_PROXY) {
-		/* proxies exclusively run on sock_raw right now */
+		/* proxies exclusively run on raw_sock right now */
 		s->req->cons->conn.ctrl = protocol_by_family(s->req->cons->addr.to.ss_family);
-		stream_interface_prepare(s->req->cons, &sock_raw);
+		stream_interface_prepare(s->req->cons, &raw_sock);
 		if (!si_ctrl(s->req->cons))
 			return SN_ERR_INTERNAL;
 	}