"Debug" flag warning in INI file has inadequate wording

[ThrawnCA]

The INI file template has a warning on the debug flag, but that warning doesn't properly match the documentation. Specifically, the warning says that the flag must be false in a production environment, but the real rule, as described at https://docs.ckan.org/en/latest/maintaining/configuration.html, is that it must be false for a public site. These are very different criteria; it's not uncommon to have publicly facing, but not advertised, non-production environments.

CKAN Version if known (or site URL)

CKAN 2.8.2

Please describe the expected behaviour

The warning on debug should state that it must be false for publicly visible sites.

Please describe the actual behaviour

The warning on debug states that it must be false for production sites.

[amercader]

This sounds reasonable @ThrawnCA, do you want to submit a quick PR with the change?

[ThrawnCA]

What branch(es) should I base it on? Just master?

[ThrawnCA]

Opened #4880