* [NEW] Implement a new setting, do_not_track, to set the Do Not Track
HTTP header. This setting is disabled by default in normal mode and
enabled in whitelist mode.
* Fix the keybindings in the example config so they properly represent
the default values in the source code.
* Add some additional paranoia in the input focus code to prevent a
segfault on some sites (most notably, pnc.com).
* Fix a bug where HSTS would never be enabled if referer_mode = always
* Fix the build when debugging is enabled
* Show a warning when the binary could not be run when executing a
program based on a MIME type, except for the special "donothing"
binary name.
Tested by severals.
Ok aja@ gsoares@