[proxy] upon Haketilo launch automatically open Haketilo landing page in user......* The landing page instructs user to configure browser's proxy settings.
* It is now possible to choose the IP address to listen on via command line parameter.
* The browser launching behavior can be switched off via command line parameter.
[proxy] allow prompting the user when a package suitable for current site is ......This commit also causes uncached responses to be forced on all
HTTP request to external servers. This is needed to make sure
that changes Haketilo makes to HTTP response headers are always
picked up by the browser. The drawback is that this increases
network traffic causing a performance hit. We might optimize this
in the future.