I'm submitting a ...

• bug report
• feature request
• question about the decisions made in the repository

Do you want to request a feature or report a bug?
feature

What is the current behavior?
not documented, unspecified.
It seems to work if we specify the following, but it is not clear whether it is recommended and works as expected:

cherrypy.server.ssl_module = 'builtin'
cherrypy.server.ssl_certificate = pem_certificate_with_certificate_and_private_key
cherrypy.server.ssl_private_key = pem_certificate_with_certificate_and_private_key

or even just:

cherrypy.server.ssl_module = 'builtin'
cherrypy.server.ssl_certificate = pem_certificate_with_certificate_and_private_key

If the current behavior is a bug, please provide the steps to reproduce and if possible a screenshots and logs of the problem. If you can, show us your code.

N/A

What is the expected behavior?

possibility to use pem file with both certificate and private inside is specified and documented

What is the motivation / use case for changing the behavior?

Security is very important for web applications so it is better to have proofs from documentation that what is used is correct.
Developers are asking about such behavior, e.g.:
#1563 (comment)

Please tell us about your environment:

• CherryPy version: 18.1.2
• Python version: 3.6.5
• OS: any
• Browser: [all]

Other information (e.g. detailed explanation, stacktraces, related issues, suggestions how to fix, links for us to have context, e.g. stackoverflow, gitter, etc.)

N/A