mosquitto: upgrade 2.0.19 -> 2.0.20

Changelog:
==========
Broker:
- Fix QoS 1 / QoS 2 publish incorrectly returning "no subscribers".
  Closes #3128.
- Open files with appropriate access on Windows.
- Don't allow invalid response topic values.
- Fix some strict protocol compliance issues.

Client library:
- Fix cmake build on OS X.

Build:
- Fix build on NetBSD

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-networking/recipes-connectivity/mosquitto/mosquitto_2.0.19.bb → meta-networking/recipes-connectivity/mosquitto/mosquitto_2.0.20.bb

@@ -19,7 +19,7 @@ SRC_URI = "http://mosquitto.org/files/source/mosquitto-${PV}.tar.gz \
            file://2895.patch \
 "
 
-SRC_URI[sha256sum] = "33af3637f119a61c509c01d2f8f6cc3d8be76f49e850132f2860af142abf82a9"
+SRC_URI[sha256sum] = "ebd07d89d2a446a7f74100ad51272e4a8bf300b61634a7812e19f068f2759de8"
 
 inherit systemd update-rc.d useradd cmake pkgconfig