Tests if @auth is ready to make a request for @msg with. For most
auths, this is equivalent to soup_auth_is_authenticated(), but for
some auth types (eg, NTLM), the auth may be sendable (eg, as an
authentication request) even before it is authenticated.
Tests if @auth is ready to make a request for @msg with. For most auths, this is equivalent to soup_auth_is_authenticated(), but for some auth types (eg, NTLM), the auth may be sendable (eg, as an authentication request) even before it is authenticated.