[fix] revoked_on is obsolete

rfc/0004_ws2p_v1.md

@@ -613,7 +613,7 @@ JSON response to success :
                             "sig": String(membership document signature in base64),
                             "signature": String(doubloon with "sig" field),
                             "type": String(doubloon with "membership" field),
-                            "userid": String(),
+                            "userid": String(username),
                             "written": Bool(is always false),
                             "written_number": Null
                         },
@@ -622,9 +622,9 @@ JSON response to success :
                     "pubkey": String(identity pubkey in base58),
                     "revocation_sig": String(revocation document signature in base64, empty where the identity is not revoked),
                     "revoked": Bool(),
-                    "revoked_on": Number(?),
+                    "revoked_on": Number(obsolete field to be deleted),
                     "sig":String(identity document signature in base64),
-                    "uid": String(),
+                    "uid": String(username),
                     "wasMember": Bool(true if the identity has already been a member at least once)
                 },
                 Object(IDTY_2),