MINOR: quic: Optional header protection key for quic_tls_derive_keys()

quic_tls_derive_keys() is responsible to derive the AEAD keys, IVs and$
header protection key from a secret provided by the TLS stack. We want
to make the derivation of the header protection key be optional. This
is required for the Key Update process where there is no update for
the header protection key.
1 file changed