SafeSEH support for mingw-w64 for Tor Browser on Windows

Not only SEH, because of www.fuzzysecurity.com/tutorials/expDev/3.html Even YASM can do it https://www.tortall.net/projects/yasm/manual/html/objfmt-win32-safeseh.html

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information