incorporate 33545 into changelog.

ChangeLog

-Changes in version 0.4.3.4-rc - 2020-04-1?
+Changes in version 0.4.3.4-rc - 2020-04-13
   Tor 0.4.3.4-rc is the first release candidate in its series. It fixes
   several bugs from earlier versions, including one affecting DoS
   defenses on bridges using pluggable transports.
@@ -70,6 +70,9 @@ Changes in version 0.4.3.4-rc - 2020-04-1?
       decoding onion service descriptors as a relay. Also add some
       diagnostics to debug any future bugs in that area. Fixes bug
       31669; bugfix on 0.3.0.1-alpha.
+    - Block a client-side assertion by disallowing the registration of
+      an x25519 client auth key that's all zeroes. Fixes bug 33545;
+      bugfix on 0.4.3.1-alpha. Based on patch from "cypherpunks".
   o Code simplification and refactoring:
     - Disable our coding standards best practices tracker in our git

changes/bug33545

-  o Minor bugfixes (hidden services):
-    - Block a client-side assert by disallowing the registration of an x25519
-      client auth key that's all zeroes. Fixes bug 33545; bugfix on
-      0.4.3.1-alpha. Patch based on patch from "cypherpunks".
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