Summary:
This adds the ability to provide an infinitepush namespace configuration without actually allowing infinite pushes server side. This is useful while Mercurial is the write master for Infinite Push commits, for two reasons:
- It lets us enable the infinitepush namespace, which will allow the sync to proceed between Mercurial and Mononoke, and also prevents users from making regular pushes into the infinitepush namespace.
- It lets us prevent users from sending commit cloud backups to Mononoke (we had an instance of this reported in the Source Control @ FB group).
Note that since we are routing backfills through the shadow tier, I've left infinitepush enabled there.
Reviewed By: StanislavGlebik
Differential Revision: D16071684
fbshipit-source-id: 21e26f892214e40d94358074a9166a8541b43e88
