Fix clang build, using REINPLACE_CMD to change gcc to ${CC}.

Add missing #include <string.h> in dns.c (adds files/patch-dns.c)
Fix obvious format string error in html.c (adds files/patch-html.c)

dns/checkdns/Makefile

@@ -15,7 +15,7 @@ MASTER_SITES=	http://www.enderunix.org/checkdns/ \
 MAINTAINER=	[email protected]
 COMMENT=	A domain name server analysis and reporting tool
 
-MAKE_JOBS_SAFE=  yes
+MAKE_JOBS_SAFE=	yes
 
 SUB_FILES=	pkg-message
 
@@ -24,6 +24,7 @@ PORTDOCS=	AUTHORS COPYING ChangeLog INSTALL README THANKS TODO
 post-patch:
 	@${REINPLACE_CMD} -e 's|/usr/local|${PREFIX}|g' ${WRKSRC}/main.c \
 		${WRKSRC}/INSTALL ${WRKSRC}/README ${WRKSRC}/checkdns.conf-dist
+	@${REINPLACE_CMD} -e 's|CC = gcc|CC = ${CC} -include string.h|' ${WRKSRC}/Makefile
 
 post-install:
 	@if [ ! -f ${PREFIX}/etc/checkdns.conf ]; then \

dns/checkdns/files/patch-dns.c

@@ -0,0 +1,10 @@
+--- ./dns.c.orig	2011-07-01 03:28:55.000000000 +0200
++++ ./dns.c	2011-07-01 03:29:06.000000000 +0200
+@@ -11,6 +11,7 @@
+ #include <arpa/inet.h>
+ #include <arpa/nameser.h>
+ #include <resolv.h>
++#include <string.h>
+
+ #include "defs.h"
+ #include "tools.h"

dns/checkdns/files/patch-html.c

@@ -0,0 +1,11 @@
+--- ./html.c.orig	2011-07-01 03:29:42.000000000 +0200
++++ ./html.c	2011-07-01 03:29:52.000000000 +0200
+@@ -58,7 +58,7 @@
+ 	fprintf(fd, "<br>\n");
+
+ 	fprintf(fd, "<br>\n");
+-	fprintf(fd, "<table width=\"100%\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" class=\"domains\">\n");
++	fprintf(fd, "<table width=\"100%%\" border=\"1\" cellspacing=\"0\" cellpadding=\"0\" class=\"domains\">\n");
+ 	fprintf(fd, "  <tr align=\"left\" valign=\"middle\">\n");
+ 	fprintf(fd, "    <td class=\"table_header\">&nbsp;%s</td>\n", l_no);
+ 	fprintf(fd, "    <td class=\"table_header\">&nbsp;%s</td>\n", l_domain);