certificate-transparency: init at 2015-11-27

libevhtp: 1.2.10 -> 1.2.11

Package for certificate-transparency

This adds openssl support to libevent.  Libevent can be compiled without
openssl, in which case it just doesn't build the libevent_openssl
library.  However it seems simpler just to default to including openssl
support.

This bumps evhtp's version because 1.2.11 provides pkg-config
information which makes building certificate-transparency easier.

This has been tested with `doCheck = true;`.

Signed-off-by: Edward Tjörnhammar <ed@cflags.cc>