[dev] Quick note on Zebra

Commit: 8619629ada22ed19eb95d491799cc03a13d6d8aa on master provides a fix for zebra shutdown that stops a infinite loop from happening if you have routemaps. This was introduced by commit 75a2b29dd6b25725274bb8d8bd145e198a37d5f5. This was committed mid/late June in master, so if you have something in that time please feel free to upgrade to a newer version. thanks! donald