D23537: extend state verification to open connection commands

[Harald Sitter]

sitter planned changes to this revision.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D23537

To: sitter, dfaure
Cc: fsitter, kde-frameworks-devel, LeGast00n, GB_2, michaelh, ngraham, bruns