2454a8558a Docs: More precise explanation of parameter "onlynet" (wodry)
Pull request description:
See issue #13378
Tree-SHA512: d51e81e4ef7fe084c3c9accf3433760fb34c02d149bb2d7006545fecdf68ecd4a5c5bfd0585fd5caff2f034eb96c7da80e85cb04c0ff3edb4c9c65ab56eb2847
Backport of Core [[https://github.com/bitcoin/bitcoin/pull/13418 | PR13418]]