net/mosquitto: bump to 1.6.7

Fixes compatibility with newer libwebsockets versions.
Fixes performance issues with websockets
Fixes potential crash on config reload
Fixes CVEs: CVE-2019-11778 and CVE-2019-11779
Various MQTTv5 fixes.
Skips releases with critical regressions

Changelog for 1.6.7:
https://mosquitto.org/blog/2019/09/version-1-6-7-released/

Changelog for 1.6.5:
https://mosquitto.org/blog/2019/09/version-1-6-5-released/

Changelog for 1.6.6:
https://mosquitto.org/blog/2019/09/version-1-6-6-released/

Signed-off-by: Karl Palsson <karlp@etactica.com>

net/mosquitto/Makefile

@@ -9,7 +9,7 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mosquitto
-PKG_VERSION:=1.6.4
+PKG_VERSION:=1.6.7
 PKG_RELEASE:=1
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
@@ -17,7 +17,7 @@ PKG_CPE_ID:=cpe:/a:eclipse:mosquitto
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=https://mosquitto.org/files/source/
-PKG_HASH:=a3d5822c249f6a6e13311b1b09eff6807ea01608a5a77934e1769842e9d146ef
+PKG_HASH:=bcd31a8fbbd053fee328986fadd8666d3058357ded56b9782f7d4f19931d178e
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 
 include $(INCLUDE_DIR)/package.mk