[Qemu-block] [PATCH v3] crypto: Implement TLS Pre-Shared Keys (PSK).

[Richard W.M. Jones]

v2 was here:

  https://lists.nongnu.org/archive/html/qemu-devel/2018-06/msg07404.html

v2 -> v3:

 - Offer ECDHE-PSK key exchange algorithm too.

 - Added a regression test to tests/test-crypto-tlssession.c

Rich.