Sets auth_callback as an authentication-handling callback for domain.
Whenever a request comes in to domain which cannot be authenticated via a
domain-specific auth callback (eg, callbackAuthDomainDigestAuthCallback),
the generic auth callback will be invoked. See
callbackAuthDomainGenericAuthCallback for information on what the callback
should do.
Sets auth_callback as an authentication-handling callback for domain.
Whenever a request comes in to domain which cannot be authenticated via a domain-specific auth callback (eg, callbackAuthDomainDigestAuthCallback), the generic auth callback will be invoked. See callbackAuthDomainGenericAuthCallback for information on what the callback should do.