Use canonical host rather than target so that this works:
CC=i686-w64-mingw32-gcc ./configure --host=i686-w64-mingw32
Conditionally compile Linux issetugid compatibility function
ok beck@
From kettenis@
People have suggested using pthread_atfork(3) before, but discarded
the idea because it involves linking with -lpthread, which has other
undesirable consequences. However:
* Most systems actually have pthread_atfork(3) in libc. I verified
this on OS X and Solaris. I believe this is the case on Linux
systems that use musl as well.
* On Linux systems that use glibc, this isn't the case. However,
those systems have __register_atfork(3), which is fully documented
in the "Linux Standard Base Core Specification".
ok kettenis@ deraadt@ beck@
