MacroFake 4a8709821e Merge bitcoin/bitcoin#24830: init: Allow -proxy="" setting values ...

1d4122dfef init: Allow -proxy="" setting values (Ryan Ofsky)

Pull request description:

  This drops the `No proxy server specified. Use -proxy=<ip> or -proxy=<ip:port>` error when a empty `-proxy=` command line argument, `bitcoin.conf` value, or `settings.json` value is specified, and just makes bitcoin connect and listen normally in these cases.

  The error was originally added in https://github.com/bitcoin/bitcoin/pull/20003 to prevent a bare `-proxy` command line argument with no assignment from clearing proxy settings. But it was implemented in an overbroad way breaking empty `-proxy=` assignments as well.

  The motivation for this change is to prevent a GUI bug that happens with https://github.com/bitcoin/bitcoin/pull/15936, reported in https://github.com/bitcoin/bitcoin/pull/15936#pullrequestreview-937685759 by vasild, that happens after a proxy setting is enabled and disabled in the GUI. But this change also makes sense on its own to remove a potentially confusing error message.

ACKs for top commit:
  hebasto:
    re-ACK 1d4122dfef, only rebased since my recent [review](https://github.com/bitcoin/bitcoin/pull/24830#pullrequestreview-941255672).

Tree-SHA512: 753adfce199ed078a6cd9e0ea78e76c0b14070f8fcfe2a4632cd0c6dfe6b4e135ddffbe11a97e5e30520ea9e5bda00bad1493cbaef74cf425aa8613249167f53

2022-05-20 08:28:08 +01:00

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