V3 to dos

[bellrichm]

List of small things that need to be done before release

• [ ] Update v2 to v3 upgrade wiki page https://github.com/bellrichm/WeeWX-MQTTSubscribe/wiki/Upgrade-Guide#upgrading-to-v3-from-v2
• [x] Update understanding log wiki page
• [x] Update debugging wiki page
• [x] Review install, sudo not necessary for v5 because run as weewx user?
• [x] v5 non sudo with v3
• [x] V5 non sudo with v2
• [x] Log paho.mqtt.__version__
• [x] Ability to log trace when running in simulator mode
• [x] Run simulator without MQTTSubscribeDriver and MQTTSubscribeService sections
• [x] Change log_file to logging_file (code)
• [x] Change log_file to logging_file (wiki)
• [x] Add a faq wiki page https://github.com/bellrichm/WeeWX-MQTTSubscribe/wiki/FAQ
• [x] Add a faq about 4.x support starting at (need to research)
• [x] Add a faq about 5.x support starting at 5.x due to running as weewx user
• [x] Remove manual install instructions from MQTTSubscribe.py
• [x] Wiki page for new Parser mode https://github.com/bellrichm/WeeWX-MQTTSubscribe/wiki/Parser-mode
• [x] Parser change --log-level to --logging-level
• [x] Parser change --log-file to --logging-file
• [x] Rename log_validation_errors. stop_on_validation_errors?
• [ ] Review upgrade section of readme
• [ ] Review reconfigure section of readme
• [ ] Add protocol option to wiki
• [ ] Add clean_start to wiki
• [ ] Create release/release notes