use vfork if possible in posix_spawn
[musl] / src / process / vfork.c
2011-10-15 Rich Felkermake available a namespace-safe vfork, if supported
2011-03-20 Rich Felkerglobal cleanup to use the new syscall interface
2011-02-12 Rich Felkerinitial check-in, version 0.5.0