Logging TLS connection parameters

[Hallvard Breien Furuseth <h.b.furuseth@usit.uio.no>]

I'd like TLS version/cipher logged with "TLS established", so I've
cherry-picked these commits to our RE24 installation:

  7d6d694 ITS#7683 log tls prot/cipher info
  0045e56 ITS#7683 more for tls version/cipher info

Also this looks like it should go with them, though we use OpenSSL:

  7a7d941 ITS#7979 MozNSS fix for TLS_PROTOCOL_MIN

Do anyone remember if this is complete, or if any fixups are needed?
I've not spotted any more commits, anyway.

-- 
Hallvard