Single certificate in `tls_client_trusted_certs`

[ziopio]

Documentation states that tls_client_trusted_certs can be set to {priv, app_name, "relative/single.pem"} although code looks like is always treating the third element as a directory.

I did not test this but from the code it looks like "relative/single.pem" will be joined with Domain in any case.

grisp_cryptoauth/src/grisp_cryptoauth_tls.erl

Line 152 in 8682e52

catch throw:_Reason -> []

load_cert will always concat .pem or .crt and the failure is catched and silenced, which IMO would be bad is the user specified an explicit cert

But again I did not test it so cannot be sure.