Make OnClientAuthorized use Steam2 ids where available
Update OnClientAuthorized function doc
Unify Player::GetSteamXId returns, clarify doc, and fix checks
Update the missed steamid nullcheck in clientprefs
Fix typo, fix build
Merge remote-tracking branch 'upstream/pr/155'
Fix client listener OnClientAuthorized to match new doc
Merge remote-tracking branch 'upstream/pr/155'