[Dillo-dev] [PATCH] Add user-controllable Sec-GPC header

Hi, The attached patch adds a Sec-GPC header to Dillo. It defaults to ON, and is controllable through a dillorc setting of 'http_sec_gpc'. Also, I changed DNT to be user-controllable with a dillorc setting of 'http_dnt', also defaults to ON. I know that this is too late to get in for the 3.3.0 release, but I'm sending it for review now, and if there are any issues it should allow plenty of time to fix. Regards, Alex