[stable/bobcat] Support checking service ports with ssl connection #895
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By default netcat is used to check if a service is listening on a port. This is generally ok except
for services expecting SSL connections which need
to be properly closed and netcat can't do that. So here we add support for optionally using the python ssl library to create an ssl connection to the port and close it properly once finished.
Related-Bug: #1920770
(cherry picked from commit 0071e27)