release notes for 2.4

RELEASE-NOTES

@@ -1,3 +1,17 @@
+# Release 2.4
+ * Openalias support was merged into the main code.
+ * The DNSSEC validation procedure (used for OpenAliases) was
+   rewritten. The previous validation method, which was included in
+   the OpenAlias plugin, is vulnerable and should not be trusted
+   (Electrum 2.0 to 2.3).
+ * Payment requests can be signed with DNSSEC aliases. This
+   effectively extends BIP70 to user aliases.
+ * New 'email' plugin, that enables sending and receiving payment
+   requests by email.
+ * Arbitrary m-of-n multisig wallets are supported (n<=15).
+ * Multisig wallets can be signed with Trezor.
+ * User-set transaction fees are retained with the '!' shortcut.
+
 # Release 2.3.3
  * fix proxy settings (issue #1309)
  * improvements to the transaction dialog: