fix: use default values correctly

Method to_sym is not defined on nil.

Signed-off-by: zeljko <zeljko@zwr.fi>
ignore non href links

Signed-off-by: zeljko <zeljko@zwr.fi>
when done set status to off

Signed-off-by: zeljko <zeljko@zwr.fi>
sleep when needed

Signed-off-by: zeljko <zeljko@zwr.fi>