missing grp.h header

[Jason A. Donenfeld]

Hi all,

Gentoo ships with the attached patch for 5.4.4 to quiet build-time
warnings. Would you upstream this?

Thanks,
Jason

diff -ru opensmtpd-5.4.4p1/smtpd/ca.c opensmtpd-5.4.4p1-modified/smtpd/ca.c
--- opensmtpd-5.4.4p1/smtpd/ca.c	2014-12-24 11:46:55.000000000 +0100
+++ opensmtpd-5.4.4p1-modified/smtpd/ca.c	2015-01-08 17:09:37.845328217 +0100
@@ -30,6 +30,7 @@
 #include <imsg.h>
 #include <pwd.h>
 #include <err.h>
+#include <grp.h>
 
 #include <openssl/ssl.h>
 #include <openssl/pem.h>
diff -ru opensmtpd-5.4.4p1/smtpd/pony.c opensmtpd-5.4.4p1-modified/smtpd/pony.c
--- opensmtpd-5.4.4p1/smtpd/pony.c	2014-12-24 11:46:55.000000000 +0100
+++ opensmtpd-5.4.4p1-modified/smtpd/pony.c	2015-01-08 17:09:47.117393942 +0100
@@ -35,6 +35,7 @@
 #include <time.h>
 #include <unistd.h>
 #include <vis.h>
+#include <grp.h>
 
 #include "smtpd.h"
 #include "log.h"