Verify of a site with function "hosting_get_features" overwrites the `~/.drush/drushrc.php` file.

I am trying to host a site that itself, has the hosting modules.

It was breaking my aegir! After much trial and error I discovered it was the verify process on the hosted site.

I tracked it down to verify.provision.inc:

    if (function_exists('hosting_get_features')) {
      // We're verifying the hostmaster site, so record a list of enabled
      // Hosting Features.
      $aegir_drushrc = new Provision_Config_Drushrc_Aegir();
      $aegir_drushrc->write();
    }

I am going to attempt to use

d('@hostmaster')

to detect a running "hostmaster" site instead.