Add "unconfirmed" plugin

See merge request !270

Move the "thematic" theme to themes-misc

See merge request !269

Obsolete / unsupported theme, see issue #101 for more context.

Move tanzaku theme to themes-misc

See merge request !268

See issue #101.

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.

Update dependency noblogs/ai-mu-plugins to v0.4.10

See merge request !266

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

In case it's a tmpfs.

Update htaccess rules for WP-SuperCache

See merge request !265

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.

Update dependency noblogs/nospam to v0.2.3

See merge request !264

Update dependency noblogs/ai-global-activity-plugin to v0.0.23

See merge request !263

Update dependency noblogs/ai-authenticate-rest-api-plugin to v0.0.4

See merge request !262

Update dependency noblogs/ai-mu-plugins to v0.4.9

See merge request !260

Update dependency wpackagist-plugin/wp-piwik to v1.0.28

See merge request !258