Sets whether conn uses the system certificate database to verify
peer certificates. This is true by default. If set to false, then
peer certificate validation will always set the
gio.types.TlsCertificateFlags.UnknownCa error (meaning
#GTlsConnection::accept-certificate will always be emitted on
client-side connections, unless that bit is not set in
#GTlsClientConnection:validation-flags).
Sets whether conn uses the system certificate database to verify peer certificates. This is true by default. If set to false, then peer certificate validation will always set the gio.types.TlsCertificateFlags.UnknownCa error (meaning #GTlsConnection::accept-certificate will always be emitted on client-side connections, unless that bit is not set in #GTlsClientConnection:validation-flags).