Disallow all bots by default. (for those bots who honor wildcards)

Block more crawlers.

updates robots.txt, block more bots

Remove search box.

Markmail couldn't find a sustainable business model, and is gone.

Message list fix

Fix links to messages where parsing the subject failed

Update base image, add local plausible

Base image + combust update; github actions build

Dockerfile: update base image to v3.16.0

Add missing Starman and Plack modules