When we added Apache as a filtering proxy on our Gitea backends in
order to more easily mitigate resource starvation, we did not set
any tuning to tell it when to recycle worker processes. As a result,
backends may continue serving requests with workers which pre-date
certificate rotation. This problem has also become more broadly
prevalent throughout our services with the introduction of Let's
Encrypt's 3-month certificate expirations as compared to our
previous 2-year certificates.
Add the same MaxConnectionsPerChild tuning to our Gitea backend
proxies as we use for our static sites and mirror servers.
Change-Id: I77d89385178a30f7dc5d04bedd0ab3772865c09f
c4be87753f