gboolean camel_sasl_gssapi_is_available (
Whether the GSSAPI/KRB5 sasl authentication mechanism is available, which means whether Camel was built with KRB5 enabled.
void camel_sasl_gssapi_override_host_and_user (
const gchar *override_host,
const gchar *override_user);
Set host and user to use, instead of those in CamelService's settings. It's both or none, aka either set both, or the settings values are used. This is used to not require CamelService instance at all.