Results 4 issues of George McCandless

This PR fixes #1538. It: - Gracefully changes the config option 'onionservicesonly=true' to 'onlynet=onion', upgrading old config directives upon GUI settings dialog "OK" - When onion services only is requested,...

According to @g1itch in [a comment on](https://github.com/Bitmessage/PyBitmessage/issues/1538#issuecomment-703701796) #1538, the sole onion bootstrap server is down. This poses extra problems when 'onionservicesonly=true' (old style) or 'onlynet=onion' (new style, see #1694): either...

This project and Lightning Network are a match made in heaven. However, this would require the tip4commit.com maintainers to run a LN node, e.g. [c-lightning](https://github.com/ElementsProject/lightning). It's not clear to me...

enhancement

The withdrawal threshold appears to be hardcoded at 0.005 BTC. Note, however, that there are only two projects on https://tip4commit.com (this project and [super3/peercoin.net](https://github.com/super3/peercoin.net)) with a balance above 0.5 BTC....