In test with ngtcp2 example client using openssl, session resumption
against a QUIC wolfssl server failed. The error was tracked down to
wolfSSL believing EaryData needs to be handled and returning SUCCESS
from wolfSSL_SSL_do_handshake() after the server Finished had been
sent.
However the handshake was not complete and ngtcp2 invoked the
post_handshake processing for new data arriving from the client.
This failed a check in post processing that the ssl->handShakeState
actually was HANDSHAKE_DONE.
The workaround in this PR repeats do_handshake until the ssl
state acually says it is complete. This way, session resumption works.
Either this alternative do_handshake() is merged for QUIC protocol
hanlders. Or we need to fix the 'normal' do_handshake() to no return
SUCCESS when early data is expected on a QUIC WOLFSSL.
ea04ffc99f