* Fix for JoinMarket web UI
The SSL file permissions didn't work, hence we generate them on our own now. Also removed a leftover nginx file for the superfluous http version.
* Assume clean install state, overwrite potentially outdated nginx configs
* Remove potentially existing SSL directory, create fresh certificate files
* Add JoinMarket Web UI
* Update webserver config
* Add update option
* Improve logging for api service
* Improve install and update script
* Update version and install process
* Use correct onion service script
* Ensure JoinMarket is installed
* add joinmarket-webui precheck to load wallet.dat