travis: Build-test updown and ext-auth plugins for Windows
vici: Add vici.gemspec.in and vici.rb to distribution
ip-packet: Fix removal of TFC padding for IPv6

The IPv6 length field denotes the payload length after the 40 bytes header.

Fixes: 293515f95cf5 ("libipsec: remove extra RFC4303 TFC padding appended to inner payload")
libimcv: Add generic constructor for PA-TNC attributes
android: Fix PA-TNC construction based on data passed via JNI