implement new posix_spawn flag POSIX_SPAWN_SETSID
this functionality has been adopted for inclusion in the next issue of
POSIX as the result of Austin Group issue #1044.
based on patch by Daurnimator.
diff --git a/include/spawn.h b/include/spawn.h
index 29c799e..f3e9e23 100644
--- a/include/spawn.h
+++ b/include/spawn.h
@@ -21,6 +21,7 @@
#define POSIX_SPAWN_SETSIGMASK 8
#define POSIX_SPAWN_SETSCHEDPARAM 16
#define POSIX_SPAWN_SETSCHEDULER 32
+#define POSIX_SPAWN_SETSID 128
typedef struct {
int __flags;