Log Message:
Update to 0.67

Changelog:  2016-03-05 PuTTY 0.67 released, fixing a SECURITY HOLE

PuTTY 0.67, released today, fixes a security hole in 0.66 and
before: vuln-pscp-sink-sscanf. It also contains a few other small
bug fixes.

Also, for the first time, the Windows executables in this release
(including the installer) are signed using an Authenticode certificate,
to help protect against tampering in transit from our website or
after downloading. You should find that they list "Simon Tatham"
as the verified publisher.