ldns: Fix two CVEs

CVE-2017-1000231 and CVE-2017-1000232.

Taken from Fedora.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

libs/ldns/Makefile

@@ -9,7 +9,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=ldns
 PKG_VERSION:=1.7.0
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.nlnetlabs.nl/downloads/ldns
@@ -17,7 +17,7 @@ PKG_HASH:=c19f5b1b4fb374cfe34f4845ea11b1e0551ddc67803bd6ddd5d2a20f0997a6cc
 
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE
-PKG_MAINTAINER:=Nicolas Thill <nico@openwrt.org>
+PKG_MAINTAINER:=
 
 PKG_FIXUP:=autoreconf
 PKG_INSTALL:=1