In an attempt to slice off as much non-NSS specific changes as possible from
the larger libnss patch proposed in [0], the attached patch contains the ssl
test harness refactoring to support multiple TLS libraries.
The changes are mostly a refactoring to hide library specific setup in their
own modules, but also extend set_server_cert() to support password command
which cleans up the TAP tests from hands-on setup and teardown.
cheers ./daniel
[0] https://postgr.es/m/FAB21FC8-0F62-434F-AA78-6BD9336D630A@yesql.se
