Trust your own certificate authority

Trau now reaches self-hosted code hosts and trackers whose certificates an internal authority signed. Doctor puts problems first and shows the command that fixes each one.

Added

Name your internal certificate authority in Settings, and trau reaches self-hosted GitLab, Bitbucket, Jira and Azure DevOps behind it
A temporary switch skips certificate checks for those hosts until the right authority is set, and trau doctor warns while it is on
trau doctor can print only its problems, or a machine-readable report that scripts and agents can act on

Changed

trau doctor lists problems first, folds passing checks into one line, and ends with every fix command in one place