DOC: update RFC references

A few doc and code comment updates bumping RFC references to the new
ones.
diff --git a/include/common/defaults.h b/include/common/defaults.h
index 1618ab4..81dc3b1 100644
--- a/include/common/defaults.h
+++ b/include/common/defaults.h
@@ -136,7 +136,7 @@
 #endif
 
 // cookie delimitor in "prefix" mode. This character is inserted between the
-// persistence cookie and the original value. The '~' is allowed by RFC2965,
+// persistence cookie and the original value. The '~' is allowed by RFC6265,
 // and should not be too common in server names.
 #ifndef COOKIE_DELIM
 #define COOKIE_DELIM    '~'
diff --git a/include/proto/proto_http.h b/include/proto/proto_http.h
index 9409df3..14c0ce6 100644
--- a/include/proto/proto_http.h
+++ b/include/proto/proto_http.h
@@ -30,7 +30,7 @@
 
 /*
  * some macros used for the request parsing.
- * from RFC2616:
+ * from RFC7230:
  *   CTL                 = <any US-ASCII control character (octets 0 - 31) and DEL (127)>
  *   SEP                 = one of the 17 defined separators or SP or HT
  *   LWS                 = CR, LF, SP or HT
diff --git a/include/types/proto_http.h b/include/types/proto_http.h
index 9987c33..1d378ac 100644
--- a/include/types/proto_http.h
+++ b/include/types/proto_http.h
@@ -171,7 +171,7 @@
 	 */
 	HTTP_MSG_BODY         = 27, // parsing body at end of headers
 	HTTP_MSG_100_SENT     = 28, // parsing body after a 100-Continue was sent
-	HTTP_MSG_CHUNK_SIZE   = 29, // parsing the chunk size (RFC2616 #3.6.1)
+	HTTP_MSG_CHUNK_SIZE   = 29, // parsing the chunk size (RFC7230 #4.1)
 	HTTP_MSG_DATA         = 30, // skipping data chunk / content-length data
 	HTTP_MSG_CHUNK_CRLF   = 31, // skipping CRLF after data chunk
 	HTTP_MSG_TRAILERS     = 32, // trailers (post-data entity headers)
@@ -274,7 +274,7 @@
 	STAT_STATUS_SIZE
 };
 
-/* This is an HTTP message, as described in RFC2616. It can be either a request
+/* This is an HTTP message, as described in RFC7230. It can be either a request
  * message or a response message.
  *
  * The values there are a little bit obscure, because their meaning can change