Postgres 10 images do not use --waldir instead of --xlogdir

[jzampieron]

The Postgres 10 docker entrypoint passes invalid parameters to initdb.

The --xlogdir parameter has been replaced with --waldir.

Trying to use the POSTGRES_INITDB_XLOGDIR env variable fails entirely on startup with
an empty folder.

[yosifkit]

Oh, it was just rename. It seems no one has tried to use it since we created the 10 beta image in June. Thanks for pointing it out; let me work up a PR. 😺

[jzampieron]

Excellent. For anyone searching. I worked around this issue using "POSTGRES_INITDB_ARGS" with the --waldir parameter set appropriately.

[yosifkit]

Updated images should be pushed to Docker Hub shortly: docker-library/official-images#3718.