Security update for mosquitto

This update for mosquitto fixes the following issues:

- CVE-2019-11779: Fixed insufficient parsing of SUBSCRIBE packets that could lead to a stack overflow (bsc#1151494).

This update was imported from the openSUSE:Leap:15.1:Update update project.

Fixed bugs
bnc#1151494
VUL-0: CVE-2019-11779: mosquitto: malicious MQTT sends SUBSCRIBE packet leads to stack over flow
Selected Binaries
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