[MEDIUM] splitted logs into two versions : TCP and HTTP

logs are handled better with dedicated functions. The HTTP implementation
moved to proto_http.c. It has been cleaned up a bit. Now a frontend with
option httplog and no log will not call the function anymore.
diff --git a/include/proto/log.h b/include/proto/log.h
index 7a74c82..4ed56dd 100644
--- a/include/proto/log.h
+++ b/include/proto/log.h
@@ -58,7 +58,7 @@
 /*
  * send a log for the session when we have enough info about it
  */
-void sess_log(struct session *s);
+void tcp_sess_log(struct session *s);
 
 /*
  * returns log level for <lev> or -1 if not found.
@@ -70,11 +70,6 @@
  */
 int get_log_facility(const char *fac);
 
-/*
- * Initializes some data needed later.
- */
-void init_log();
-
 #endif /* _PROTO_LOG_H */
 
 /*