FIX: Network options work only partially or not at all

Do not create another libcurl (easy) handle for the HTTP connections.
Instead, reuse the one that libquvi creates, and apply the cclive
network options (e.g. --verbose-libcurl and --no-proxy) to this handle.

This commit fixes the following reported issues:
* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=722616
* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=720870

Signed-off-by: Toni Gundogdu <legatvs@gmail.com>