unbound: Update to 1.6.1 with 2017 trust anchor

Unbound 1.6.1 has a few bug fixes for resource leaks,
configuration robustness, compile environment interaction,
and maintaining the trust anchor. The 2017 trust anchor
(DS) is built into unbound and unbound-anchor.

File /etc/unbound/root.key holds 2010/2017 DS record until 2018
https://www.icann.org/resources/pages/ksk-rollover
https://www.iana.org/domains/root

Signed-off-by: Eric Luehrsen <ericluehrsen@hotmail.com>

net/unbound/Makefile

@@ -8,8 +8,8 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=unbound
-PKG_VERSION:=1.6.0
-PKG_RELEASE:=5
+PKG_VERSION:=1.6.1
+PKG_RELEASE:=1
 
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE
@@ -17,7 +17,7 @@ PKG_MAINTAINER:=Eric Luehrsen <ericluehrsen@hotmail.com>
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.unbound.net/downloads
-PKG_MD5SUM:=78409eccf7260d260b6463f85e59c66b
+PKG_HASH:=42df63f743c0fe8424aeafcf003ad4b880b46c14149d696057313f5c1ef51400
 
 PKG_BUILD_DEPENDS:=libexpat
 PKG_BUILD_PARALLEL:=1