Revision b058bbd was causing the AsmCommon routines to overrun the code
buffer allocated for it. According to Fiora, it happens only on Linux
because of the fact that Linux has more caller-save registers than other
platforms.
Feedback is in logs as suggested by skid_au. The checkbox is still there, but
mostly for people who would like to opt out (unfortunately, I can not be sure
how this feature may behave for some routers - there's a hell of a lot of bad
UPnP implementations.)
The Visual Studio stuff is a little messy, so I apologize if anything is a bit
off. I tested most configurations and it worked.
I also tested CMake on Debian Wheezy, Ubuntu Saucy, and Mac OS X Mountain Lion.
All seemed to be OK.