Bugzilla

I was able to create a [new build plan](https://phabricator-dev.allizom.org/harbormaster/plan/11/) on phabricator-dev triggered by a [custom herald rule](https://phabricator-dev.allizom.org/H17) for updates on my own revisions.

I then added 2 build steps to create Taskcluster tasks:
1. on dev.alpha.taskcluster-dev.net
2. firefox-ci-tc.services.mozilla.com

Well that [worked immediately](https://phabricator-dev.allizom.org/harbormaster/build/8566/). I got Taskclusters on [both](https://dev.alpha.taskcluster-dev.net/tasks/MeUzWbgCTcWoxGHhVMAsLg/definition) [instances](https://firefox-ci-tc.services.mozilla.com/tasks/ERCDQBbRSXe2i8-xKHJE7Q/definition) with the expected `PHABRICATOR_BUILD_TARGET` environment variable.

I have absolutely no idea why that worked and it does not on the [initial build plan](https://phabricator-dev.allizom.org/harbormaster/build/8564/) which still gets `HTTP 3`.

We should be able to ship a custom herald rule to test that on phabricator prod soon.

I was able to create a [new build plan](https://phabricator-dev.allizom.org/harbormaster/plan/11/) on phabricator-dev triggered by a [custom herald rule](https://phabricator-dev.allizom.org/H17) for updates on my own revisions.

I then added 2 build steps to create Taskcluster tasks:
1. on dev.alpha.taskcluster-dev.net
2. firefox-ci-tc.services.mozilla.com

Well that [worked immediately](https://phabricator-dev.allizom.org/harbormaster/build/8566/). I got Taskcluster tasks on [both](https://dev.alpha.taskcluster-dev.net/tasks/MeUzWbgCTcWoxGHhVMAsLg/definition) [instances](https://firefox-ci-tc.services.mozilla.com/tasks/ERCDQBbRSXe2i8-xKHJE7Q/definition) with the expected `PHABRICATOR_BUILD_TARGET` environment variable.

I have absolutely no idea why that worked and it does not on the [initial build plan](https://phabricator-dev.allizom.org/harbormaster/build/8564/) which still gets `HTTP 3`.

We should be able to ship a custom herald rule to test that on phabricator prod soon.