net/mosquitto: update to 1.5.1

Bugfix release.  Full changelog at:
https://mosquitto.org/blog/2018/08/version-151-released/

Of most interest to OpenWrt:
* Remove use of AI_ADDRCONFIG, which means the broker can be used on systems where only the loopback interface is defined.
* Fix IPv6 addresses not being able to be used as bridge addresses.
* Fix problem opening listeners on Pi caused by unsigned char being default.
* Fix segfault on startup if bridge CA certificates could not be read.
* Fix possible endian issue when reading the memory_limit option.
* library and client bugfixes including: https://github.com/openwrt/packages/issues/6765

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

net/mosquitto/Makefile

@@ -9,14 +9,14 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mosquitto
-PKG_VERSION:=1.5
+PKG_VERSION:=1.5.1
 PKG_RELEASE:=3
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
-PKG_SOURCE_URL:=http://mosquitto.org/files/source/
-PKG_HASH:=80c9606a906c736fe582b67bdfb650ee45239fea058fe34927f81277d3486e21
+PKG_SOURCE_URL:=https://mosquitto.org/files/source/
+PKG_HASH:=8557bc7ae34dfaf32a0fb56d2491b7a7f731269c88337227233013502df4d5b0
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-$(BUILD_VARIANT)/$(PKG_NAME)-$(PKG_VERSION)
 
 include $(INCLUDE_DIR)/package.mk