This adds ARG_MAX define to be _SC_ARG_MAX

Upstream-Status: Inappropriate.
Most distros have their own verion for this fix.

Signed-off-by: Armin Kuster <akuster808@gmail.com>

Index: netkit-ftp-0.17/ftp/glob.c
===================================================================
--- netkit-ftp-0.17.orig/ftp/glob.c
+++ netkit-ftp-0.17/ftp/glob.c
@@ -50,6 +50,7 @@ char glob_rcsid[] =
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include "ftp_var.h"  /* for protos only */
 #include "glob.h"
@@ -57,6 +58,9 @@ char glob_rcsid[] =
 #define	QUOTE 0200
 #define	TRIM 0177
 #define	eq(a,b)		(strcmp(a, b)==0)
+#ifndef ARG_MAX
+#define ARG_MAX (sysconf(_SC_ARG_MAX))
+#endif
 #define	GAVSIZ		(ARG_MAX/6)
 #define	isdir(d)	((d.st_mode & S_IFMT) == S_IFDIR)