Security update for tigervnc

This update for tigervnc fixes the following issues:

- CVE-2020-26117: Server certificates were stored as certiticate
authorities, allowing malicious owners of these certificates
to impersonate any server after a client had added an exception

This update was imported from the SUSE:SLE-15-SP1:Update update project.

Fixed bugs
VUL-0: CVE-2020-26117: tigervnc: certificate exceptions stored as authorities
Selected Binaries
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