[MEDIUM] rename process_request to http_process_request

Now the function only does HTTP request and nothing else. Also pass
the request buffer to it.
diff --git a/include/proto/proto_http.h b/include/proto/proto_http.h
index 343bbe6..04e68a8 100644
--- a/include/proto/proto_http.h
+++ b/include/proto/proto_http.h
@@ -62,7 +62,7 @@
 int process_cli(struct session *t);
 int process_srv_data(struct session *t);
 int process_srv_conn(struct session *t);
-int process_request(struct session *t);
+int http_process_request(struct session *t, struct buffer *req);
 int http_process_tarpit(struct session *s, struct buffer *req);
 int http_process_request_body(struct session *s, struct buffer *req);
 int process_response(struct session *t);