HTTPS verification is totally broken in Transmission. Unclear why. Disabling as a result.

Safari exposes a JavaScript bug that makes it not load. Fixed.

Portcheck was backported to HTTPS for testing initially. Seems like a good idea.

Makefile was also fixed to use the external libnatpmp. Smaller binary.

Signed-off-by: Rosen Penev <rosenp@gmail.com>