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
Fix client listener OnClientAuthorized to match new doc
Merge pull request #155 from alliedmodders/onclientauth-steam2

Make OnClientAuthorized use Steam2 ids where available (r=asherkin).