…sable

60aa179 Use GetPathArg where possible (Pavol Rusnak)
5b946ed util, refactor: Use GetPathArg to read "-settings" value (Ryan Ofsky)
687e655 util: Add GetPathArg default path argument (Ryan Ofsky)

Pull request description:

  Improve `ArgsManager::GetPathArg` method added in recent PR bitcoin#24265, so it is usable more places. This PR starts to use it for the `-settings` option. This can also be helpful for bitcoin#24274 which is parsing more path options.

  - Add `GetPathArg` default argument so it is less awkward to use to parse options that have default values.
  - Fix `GetPathArg` negated argument handling. Return path{} not path{"0"} when path argument is negated.
  - Add unit tests for default and negated cases
  - Move `GetPathArg` method declaration next to `GetArg` declaration. The two methods are close substitutes for each, so this should help keep them consistent and make them more discoverable.

ACKs for top commit:
  w0xlt:
    Tested ACK 60aa179 on Ubuntu 21.10
  hebasto:
    re-ACK 60aa179

Tree-SHA512: 3d24b885d8bbeef39ea5d0556e2f09b9e5f4a21179cef11cbbbc1b84da29c8fb66ba698889054ce28d80bc25926687654c8532ed46054bf5b2dd1837866bd1cd

fa097d0 addrman: Log too low compat value (MarcoFalke)

Pull request description:

  Before this patch, when writing a negative `lowest_compatible` value, it would be read as a positive value. For example `-32` will be read as `224`. There is generally nothing wrong with that. Though, similarly there shouldn't be anything wrong with refusing to read a negative value. I find the code after this patch more logical than before. Also, this allows dropping a file-wide sanitizer suppression.

  In practice none of this should ever happen. Bitcoin Core would never write a negative `lowest_compatible` in normal operation, unless the file storage is later corrupted by external influence.

ACKs for top commit:
  mzumsande:
    re-ACK fa097d0

Tree-SHA512: 9aae7b8fe666f52f667f149667025e0160cef1a793cc4d392e36608f65c2bee8096da429235118f40a3368f327aabe30f3732ae78c5874648ea6f423f2687b65