sysutils/dupd: Fix the broken build

An issue in my build pipeline allowed me to not notice the broken build.
This commit add a patch to fix the build, so the port is available again

PR:		226841
Submitted by:	tom@hur.st (maintaner)

sysutils/dupd/Makefile

@@ -11,7 +11,6 @@ COMMENT=	File duplicate detection CLI utility
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-BROKEN=	undefined reference to `_binary_man_dupd_start'
 NOT_FOR_ARCHS=	arm armv6 armv7 i386 mips powerpc
 NOT_FOR_ARCHS_REASON=	test fails on large files on 32-bit
 

sysutils/dupd/files/patch-src_main.c

@@ -0,0 +1,23 @@
+--- src/main.c.orig	2018-04-08 20:02:52 UTC
++++ src/main.c
+@@ -141,19 +141,8 @@ static void show_help()
+  */
+ static void show_usage()
+ {
++  system("/usr/bin/man dupd");
+   show_banner();
+-
+-#ifndef __APPLE__
+-  char * p = &_binary_man_dupd_start;
+-  while (p != &_binary_man_dupd_end) {
+-    putchar(*p++);
+-  }
+-#else
+-  printf("Usage documentation not available on Darwin!\n");
+-  printf("\n");
+-  printf("Alternatively, refer to the document here:\n");
+-  printf("https://github.com/jvirkki/dupd\n");
+-#endif
+ }
+ 
+