Resolving the Golang Revel Framework Error "server.go:1775: http: TLS handshake error from 127.0.0.1:36799: tls: first record does not look like a TLS handshake"

Conclusion

This error occurred when starting the app with http.ssl = true in any mode other than [prod].
For that reason, I decided to start the app with http.ssl = false in any mode other than [prod].

Overview

In the test environment, I added a [test] mode to app.conf,
created a self-signed SSL certificate there, and tried to verify the behavior of the https link.

However, although the app did start, I could not access it at all (yikes).

Since I could access it in dev mode, I compared the differences between the two and arrived at the conclusion above.

Error Details

When I start Revel and access the URL, the TLS handshake fails and I cannot access the site, as shown below.

$ revel run myapp test

...
...

INFO  2015/08/19 14:48:38 harness.go:165: Listening on :9000
2015/08/19 14:48:40 server.go:1775: http: TLS handshake error from 127.0.0.1:36799: tls: first record does not look like a TLS handshake