Changed SYNOPSIS, included <sys/types.h> before <grp.h> as it is needed

to define gid_t for getgrgid().

lib/libc/gen/getgrent.3

@@ -30,7 +30,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\"     from: @(#)getgrent.3	6.8 (Berkeley) 4/20/91
-.\"	$Id: getgrent.3,v 1.3 1993/07/30 08:36:31 mycroft Exp $
+.\"	$Id: getgrent.3,v 1.4 1993/10/04 18:39:24 jtc Exp $
 .\"
 .Dd April 20, 1991
 .Dt GETGRENT 3
@@ -45,6 +45,7 @@
 .Nm endgrent
 .Nd group database operations
 .Sh SYNOPSIS
+.Fd #include <sys/types.h>
 .Fd #include <grp.h>
 .Ft struct group *
 .Fn getgrent void