haproxy-devel widget added (by: jvorhees), (hidden)transparent proxy support, better error handling

haproxy-devel widget added (by: jvorhees), (hidden)transparent proxy support, better error handling, fixed default http check


@Jim-p, i don't think the files in /Widgets/ will be added to the main repository, they where 'moved', but Git seams to show this a little strange..