* Fix netlink SEGV on clientless netlinks (i.e. configuration error).
* Fix formatting error in p-t-p startup message.
* Additions to the test-example suite.
- * Fixes to MTU and fragmentation handling.
+ * SECURITY: Fixes to MTU and fragmentation handling.
+ * SECURITY: Correctly set "unused" ICMP header field.
+ * Do not send ICMP errors in response to unknown incoming ICMP.
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