net/mosquitto: correct config file option name

Correct option is "password_file" not "passwd_file"

Originally reported as: https://github.com/openwrt/packages/pull/8642
Added the package bump.

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

net/mosquitto/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=mosquitto
 PKG_VERSION:=1.5.8
-PKG_RELEASE:=1
+PKG_RELEASE:=2
 PKG_LICENSE:=BSD-3-Clause
 PKG_LICENSE_FILES:=LICENSE.txt
 PKG_CPE_ID:=cpe:/a:eclipse:mosquitto

net/mosquitto/files/etc/init.d/mosquitto

@@ -82,7 +82,7 @@ convert_mosq_general() {
 	append_if "$1" max_queued_bytes
 	append_if "$1" max_queued_messages
 	append_if "$1" message_size_limit
-	append_if "$1" passwd_file
+	append_if "$1" password_file
 	append_if "$1" pid_file
 	append_if "$1" psk_file
 	append_optional_bool "$1" queue_qos0_messages