fix remembering self-signed certs for hosts

- fix load logic (trusted hosts will be remembered after restart)
- save authority instead of host only (e.g. host:8080 instead of host)

Related to issue #25
restore Gerrit 2.6 support

- retrieving messages in change details is not supported

Related to issue #25
fix for self signed ssl connections

- fix escaping issues

Resolves issue #25