Re: Augment every test postgresql.conf

On Fri, Dec 28, 2018 at 06:19:50PM -0800, Noah Misch wrote:
> "env EXTRA_REGRESS_OPTS=--temp-config=SOMEFILE make check" appends the
> contents of SOMEFILE to the test cluster's postgresql.conf.  I want a similar
> feature for TAP suites and other non-pg_regress suites.  (My immediate use
> case is to raise authentication_timeout and wal_sender_timeout on my buildfarm
> animals, which sometimes fail at the defaults.)  I'm thinking to do this by
> recognizing the PG_TEST_TEMP_CONFIG environment variable as a
> whitespace-separated list of file names for appending to postgresql.conf.

Looking more closely, we already have the TEMP_CONFIG variable and apply it to
everything except TAP suites.  Closing that gap, as attached, is enough.  The
buildfarm client uses TEMP_CONFIG to implement its extra_config setting, so
this will cause extra_config to start applying to TAP suites.