We were trying to set this up today. We wanted to have a fully dockerized Phabricator setup for internal use, and need to add LDAP auth provider as the only non-automated step. It's not the end of the world though, but in case someone else wants this maybe a command line tool would be ok.

I am going to hide in a corner now. Thank you! Everything is fast now.

My Phabricator instance started going really slow. The Dark Console revealed that all the configuration checks were running with every page load (e.g. git checks, pygments, etc). Further investigation showed that the APC was not working. After some helpful tips from @epriestley, I was able to fix it. Here's the blurb I added to my php.ini: