Support HTTPS for Redis task backend

[tmak]

The problem this PR fixes:

Setting config.processor_host to an HTTPS URL and config.mode to :development leads to processing errors as the Redis task backend doesn't configure the Net::HTTP client to use SSL.

[alachaum]

Hey @tmak , good catch 😉 and thanks for submitting this PR 🙏

See my inline comment, I believe you can simplify the specs and make rubocop happy all in one go by meta-generating the spec blocks.

[alachaum]

You can probably meta-generate the specs to avoid repetition 😉

E.g.

['http', 'https'].each do |tested_protocol|
  context "with #{tested_protocol.upcase}" do
    let(:url) { "#{tested_protocol}://localhost:300/run" }
    ...
  end
end

[tmak]

Fixed.

[alachaum]

👍 thanks