Update comments in chain to be doxygen compatible
Update comments in chainparams to be doxygen compatible
Update generate-seeds.py to produce doxygen compatible comments
Update comments in key to be doxygen compatible
Update comments in keystore to be doxygen compatible
[Qt] fix slot connection problems when no wallet is loaded

- guard 4 connect calls by an #ifdef when no wallet is loaded to fix "No
  such slot" warnings
- also add comments when #ifdef ENABLE_WALLET end
- fixes #5175
Merge pull request #5148

2b173d3 Update comments in keystore to be doxygen compatible (Michael Ford)
ffd8edd Update comments in key to be doxygen compatible (Michael Ford)
Merge pull request #5142

02fe12d Update generate-seeds.py to produce doxygen compatible comments (Michael Ford)
f2e03ff Update comments in chainparams to be doxygen compatible (Michael Ford)
2fdc335 Update comments in chain to be doxygen compatible (Michael Ford)
Merge pull request #5176

981f790 [Qt] fix slot connection problems when no wallet is loaded (Philip Kaufmann)