Further changes:
- Added new configuration option Host Type
- Added abstract base class for future printer hosts
- Moved location of upload dialog (also made it a little bit more configureable)
- added possibility to send file via postfield instead a new frame
* Octoprint: GUI for CA file, improvements
* Octoprint: Add GUI for Bonjour lookup, bugfixes
* Octoprint: Bonjour browser: Cleanup Perl interaction
* Octoprint: Bonjour: Perform several broadcast, UI fixes
* Octoprint: Add files to localization list
* Http: Disable CA File setting on SSL backends that don't support it