update MD5 ref & changelog

* MD5 support is dropped, so it's not a normative reference anymore. Demote its RFC to the informative references section instead.
* Also bump changelog amendments to draft-07.

draft-ietf-tls-tls13.md

@@ -33,7 +33,6 @@ normative:
   RFC2104:
   RFC2119:
   RFC2434:
-  RFC1321:
   RFC3447:
   RFC5280:
   RFC5288:
@@ -92,6 +91,7 @@ normative:
 
 informative:
   RFC0793:
+  RFC1321:
   RFC1948:
   RFC2246:
   RFC3268:
@@ -310,6 +310,7 @@ server: The endpoint which did not initiate the TLS connection.
 
 
 draft-07
+
 - Integration of semi-ephemeral DH proposal.
 
 - Add initial 0-RTT support
@@ -320,6 +321,10 @@ draft-07
 
 - Move to HKDF
 
+- Remove support for weak and lesser used named curves.
+
+- Remove support for MD5 and SHA-224 hashes with signatures.
+
 
 draft-06
 
@@ -331,10 +336,6 @@ draft-06
 
 - Remove explicit IV.
 
-- Remove support for weak and lesser used named curves.
-
-- Remove support for MD5 and SHA-224 hashes with signatures.
-
 
 draft-05
 
@@ -343,7 +344,6 @@ draft-05
 - Fix which MS is used for exporters.
 
 
-
 draft-04
 
 - Modify key computations to include session hash.
@@ -358,6 +358,7 @@ draft-04
 
 - Remove point format negotiation.
 
+
 draft-03
 
 - Remove GMT time.