- Fixed SSL negotiation failure when connecting secure sites that do not support

  SSL compression, e.g. https://tim.rz.rwth-aachen.de/mail-lifecycle/.

- Use KTcpSocket::SecureProtocols instead of KTcpSocket:TlsV1 as the default SSL
  protocol. This fixes very slow connections to certain sites, e.g. "Search for Jobs"
  button @ http://www.suse.com/company/careers/.

- Improve the speed of SSL negotiation by caching and sharing the previous
  settings amongst ioslaves when those settings are not the default ones.
  That way any ioslave that connects to the same host afterwards does not
  have to perform the same expensive SSL negotiation process all over again.

BUG: 275524
FIXED-IN: 4.8.4
REVIEW: 103610