Issue #7333: The `posix` module gains an `initgroups()` function providing
access to the initgroups(3) C library call on Unix systems which implement
it. Patch by Jean-Paul Calderone.
diff --git a/configure.in b/configure.in
index 95d100a..e7e6b91 100644
--- a/configure.in
+++ b/configure.in
@@ -2547,7 +2547,7 @@
clock confstr ctermid execv fchmod fchown fork fpathconf ftime ftruncate \
gai_strerror getgroups getlogin getloadavg getpeername getpgid getpid \
getpriority getresuid getresgid getpwent getspnam getspent getsid getwd \
- kill killpg lchmod lchown lstat mkfifo mknod mktime \
+ initgroups kill killpg lchmod lchown lstat mkfifo mknod mktime \
mremap nice pathconf pause plock poll pthread_init \
putenv readlink realpath \
select sem_open sem_timedwait sem_getvalue sem_unlink setegid seteuid \