Server Header Returned Twice in the Response

[omar-m-othman]

The "Server" header is currently returned twice in the response. I fixed #563, so that now it returns the "Server" header either once or twice. So, the duplication is a separate issue.

[omar-m-othman]

I'm working on this.

[omar-m-othman]

This issue happens because HTTP::Server::PSGI always adds the "Server" header. I've issued plack/Plack#458 to treat that. Once that one is resolved, I'll close this issue.

[xsawyerx]

Another way to fix this would be to only add the Server header if server_tokens is on and it's not a development environment.

[xsawyerx]

Fixed and merged already.