Log Message:
Update to 5.31

Changelog:
Version 5.31, 2016.03.01, urgency: HIGH
* Security bugfixes
  - OpenSSL DLLs updated to version 1.0.2g.
    https://www.openssl.org/news/secadv_20160301.txt
* New features
  - Added logging the list of client CAs requested by the server.
  - Improved compatibility with the current OpenSSL 1.1.0-dev tree.
* Bugfixes
  - Only reset the watchdog if some data was actually transferred.
  - A workaround implemented for the unexpected exceptfds set by
    select() on WinCE 6.0 (thx to Richard Kraemer).