add new parameter description (because good doc is life)
add new parameter description (because good doc is life)

Signed-off-by: raspbeguy <8a6039daedc0ce55fa14c942c05e7e4c952b6864@hashtagueule.fr>

valdur55/py3status,vvoland/py3status,valdur55/py3status,valdur55/py3status,ultrabug/py3status,ultrabug/py3status,tobes/py3status,Andrwe/py3status,Andrwe/py3status,tobes/py3status,ultrabug/py3status,guiniol/py3status,guiniol/py3status