Allow flags to be passed to ./bin/aphlict to specify the hostname and port for the admin server. On our install, notification.server-uri is set to notify.phabricator.mydomain.com and, as such, the NodeJS server is started with --admin-host=notify.phabricator.mydomain.com instead of the desired --admin-host=0.0.0.0.

This is essentially another take on D11359.

Ran ./bin/aphlict debug with a bunch of different arguments.