The top-level README.txt says
10. OPTIONAL: Read this if you are intending to run a Sage notebook
server for multiple users. For security (i.e., to run
"notebook(secure=True)") you want to access the server using the
HTTPS protocol. First, install OpenSSL and the OpenSSL development
headers on your system if they are not already installed. Then
install pyOpenSSL by building Sage and then typing
./sage -i pyopenssl
Note that this command requires internet access. Alternatively,
"make ssl" builds Sage and installs pyOpenSSL.
A similar thing is documented in src/doc/en/installation/source.rst
But the command "make ssl" no longer works, since there is no longer a
pyopenssl package. What should be done instead?
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