mosquitto: major upgrade to 1.6.x

Major new release of mosquitto.

This release rolls up the initial 1.6.0 release, plus the subsequent
build/bug fixes of 1.6.1 and 1.6.2.

Original upstream changelogs:
https://mosquitto.org/blog/2019/04/version-1-6-released/
https://mosquitto.org/blog/2019/04/version-1-6-1-released/
https://mosquitto.org/blog/2019/04/version-1-6-2-released/

Major features of interest:
* MQTTv5 support
* performance improvements
* ALPN support
* OCSP staping support
* OpenSSL Engine support
* TLSv1.0 support dropped

Currently adds two patches to continue supporting OpenSSL engine support
being disabled, and a missing header include.  These are both tracked
upstream and are expected to be dropped in a subsequent release.

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

net/mosquitto/Makefile

@@ -9,15 +9,15 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mosquitto
-PKG_VERSION:=1.5.8
-PKG_RELEASE:=2
+PKG_VERSION:=1.6.2
+PKG_RELEASE:=1
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
 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:=78d7e70c3794dc3a1d484b4f2f8d3addebe9c2da3f5a1cebe557f7d13beb0da4
+PKG_HASH:=33499e78dfa0ca1cb488fd196fde940a66305bdfd44ba763ce2001db2569a08b
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 
 include $(INCLUDE_DIR)/package.mk