restricted the search keyword not to be used multiple times

git-svn-id: http://www.rocklinux.org/svn/rock-linux/trunk@1923 c5f82cb5-29bc-0310-9cd0-bff59a50e3bc

package/base/sysfiles/rocknet_modules_dns.sh

@@ -11,7 +11,12 @@ public_nameserver() {
 }
 
 public_search() {
-	addcode up 4 4 "echo search $1 >> /etc/resolv.conf"
+	if ! isfirst "dns_search"; then
+		error "Keyword >>search<< not allowed multiple times."
+		return
+	fi
+
+	addcode up 4 4 "echo search $* >> /etc/resolv.conf"
 	dns_init
 }