Add support for HTTP -> HTTPS redirects

[jeevatkm]

• Add support for HTTP -> HTTPS redirects
• Configuration option to enable/disable

• Implementation
• App Template update
• Documentation

Configuration

ssl {
    ...
    # Redirect HTTP => HTTPS functionality does protocol switch, so it works
    # domain and subdomains.
    # For example:
    #   http://aahframework.org      => https://aahframework.org
    #   http://www.aahframework.org  => https://www.aahframework.org
    #   http://docs.aahframework.org => https://docs.aahframework.org
    redirect_http {
      # Enabling HTTP => HTTPS redirects.
      # Default is value is `false`.
      #enable = true

      # Port no. of HTTP requests to listen.
      # For standard port `80` put empty string or a value
      # No default value, it is required value.
      port = "8080"

      # Redirect code
      # Default value is `307`.
      #code = 307
    }
    ...
}