[MEDIUM] move the HTTP request body analyser out of process_request().

A new function http_process_request_body() has been created to process
the request body. Next step is now to clean up process_request().
diff --git a/include/proto/proto_http.h b/include/proto/proto_http.h
index 535611d..343bbe6 100644
--- a/include/proto/proto_http.h
+++ b/include/proto/proto_http.h
@@ -64,6 +64,7 @@
 int process_srv_conn(struct session *t);
 int process_request(struct session *t);
 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);
 
 int produce_content(struct session *s);