postgresql93: ensure var/postgres stays user owned.
postgresql93: ensure var/postgres stays user owned.

If there's output from the PostgreSQL server send to var/postgres and
that directory doesn't exist then launchd will create it and write to it
as the root user. This can happen during upgrade or reinstallation. To
avoid this write out the logs to var/log and manually create it so that
this directory will never be destroyed and written to incorrectly.

DomT4/homebrew-versions,heuermh/homebrew-versions,coeligena/homebrew-verscustomized