[syslog-ng] Certificate valid, but invalid purpose

[W3EUU]

Running syslog-ng 3.22 OSE on Fedora 31 installation.  I am in the 
process of implementing TLS encryption on the remote links.  I have the 
links working, including the mutual authentication function.  However, I 
am getting the warning "Certificate valid, but purpose is invalid" on 
startup.  Since it is a warning, it does not seem to be affecting the 
functionality.   The certificates are self signed, with TLS Web Server 
Authentication and  TLS Web Client Authentication extensions, among others.

I am unable to find any documentation defining what additional 
extensions are needed to silence this warning.  Can anyone tell me what 
additional is required?

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