Expose explicit client auth string formats
Spin new logic into GetClientAuthString2...
and mark GetClientAuthString as deprecated, using 1.6.x GetClientAuthString behavior
Fix true return when validation wanted and steam id pending
Document possibly-unexpected yet valid auth strings
Rename GetClientAuthString2 to GetClientAuthId
Fix some nits
Consistency Fixes (ID->Id, AuthString->AuthId)
Merge pull request #147 from alliedmodders/new-auth

Expose explicit client auth id formats (r=asherkin).