Patch #568235: Add posix.setpgid.
diff --git a/configure b/configure
index 92bf5f6..d35b169 100755
--- a/configure
+++ b/configure
@@ -11449,7 +11449,7 @@
for ac_func in alarm chown chroot clock confstr ctermid ctermid_r execv \
fchdir flock fork fsync fdatasync fpathconf ftime ftruncate \
- gai_strerror getgroups getlogin getpeername getpid getpwent getwd \
+ gai_strerror getgroups getlogin getpeername getpgid getpid getpwent getwd \
hstrerror inet_pton kill killpg link lstat mkfifo mknod mktime mremap \
nice pathconf pause plock poll pthread_init \
putenv readlink \