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.

Attempts to fix the content negotiation caching issue #134.

Apparently gotosocial uses it for profile discovery.

Remove caching from pages ending with a / which MAY (or may not, more
likely) help in resolving issue #134.

Update the list of mobile user agents.

The cache/.htaccess mechanism should actually be moved into
the apache2 config, instead of the current hackish solution...

Needed to find wp-cli, a dependency of noblogs-cli.

The theory is that nowadays most themes are responsive, so there's
no need for custom "mobile detection" logic anymore. Try to validate
the theory starting with Android devices.

The WP-Supercache Apache caching will anyway cover NGINX
requests for 300s.

In case it's a tmpfs.

Specifically fix the cached files path.

Drops the 'must-revalidate' bit, which prevents serving stale pages,
and sets a longer max-age to match the edge NGINX caching ttl.

Attempts to fix issue #114.

Avoids an extra SQL lookup on every request (a drop in the
ocean, but still).

Without this package PHP can't generate OpenSSL keys apparently.

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

Only comment changes, illustrating the new defaults.