We realized that perhaps a better method of setting the scheduler host name for the default scheduler would be to use qmgr (instead of a configuration variable). Especially since doing so would match what is done when using multiple schedulers.
Please take a look at the proposal:
https://pbspro.atlassian.net/wiki/spaces/PD/pages/1318387715/Setting+the+scheduler+host+name+that+the+server+uses