trust_add_pinned_certificate

Add a pinned certificate for connections to peer for purpose.

A pinned certificate overrides all other certificate verification and should be used with care.

If the same pinned certificate already exists, then this operation does not add another, and succeeds without error.

This call may block, see [func@Gcr.trust_add_pinned_certificate_async] for the non-blocking version.

Parameters:

certificate	a Certificate
purpose	the purpose string
peer	the peer for this pinned certificate
cancellable	a Cancellable

Returns:

true if the pinned certificate is recorded successfully