Bolt: [RFC] Fix `enforce_ssl` - two options.

[bobdenotter]

As pointed out by @eduardomart on Slack: Right now, the description for enforce_ssl in config.yml says:

# Enforcing the use of SSL. If set, all but the front-end pages will enforce an
# SSL connection (and redirect to HTTPS if you attempt to visit the backend over
# plain HTTP).
enforce_ssl: true

This is incorrect. _All_ pages get redirected to their https equivalent, both front- and backend. How should we fix this?

• 1) Fix the description in config.yml, so that it matches the behaviour.
• 2) Change the behaviour, so that it matches the description: Don't redirect to https on pages in the frontend.

[GwendolenLynch]

Fix the description in config.yml, so that it matches the behaviour.

:+1:

[bobdenotter]

Closed by #6589