This reverts commit 524d28fd.

These interfere with JSON-LD activitypub requests because
apparently the '; profile="..."' part is matched by that humongous
rule 920600 regexp and ModSecurity thinks it's a charset.

Apparently gotosocial uses it for profile discovery.

Using what is hopefully the right format for the tx.allowed_request_content_type
configuration variable.

Only comment changes, illustrating the new defaults.

This reverts commit 9c69d4de.

Fixes issue ai/noblogs-wp#89.

These should help with converting widgets from legacy to
new 'blocks'.

Merges the contents of ai3/docker/noblogs (composer branch).