cmd/prometheus: improve help output
cmd/prometheus: improve help output

hustbill/prometheus,prasincs/prometheus,AlekSi/prometheus,prometheus/prometheus,robbiet480/prometheus,Colstuwjx/prometheus,Stackdriver/stackdriver-prometheus,keegancsmith/prometheus,tomwilkie/prometheus,alileza/prometheus,dalanlan/prometheus,amorken/prometheus,laushinka/prometheus,RobertKielty/prometheus,rajthilakmca/prometheus,SaltedMan/prometheus-annotated,dpatel06/prometheus,yanghongkjxy/prometheus,JavierZunzunegui/prometheus,flier/prometheus,dmilstein/prometheus,cit-lab/prometheus,bluecmd/prometheus,fabric8io/prometheus,datajet-io/prometheus,JavierZunzunegui/prometheus,jbdalido/prometheus,kangwoo/prometheus,datajet-io/prometheus,JavierZunzunegui/prometheus,jimmidyson/prometheus,Conorbro/prometheus,slok/prometheus,bluecmd/prometheus,Colstuwjx/prometheus,Conorbro/prometheus,ton31337/prometheus,brancz/prometheus,tomwilkie/prometheus,datajet-io/prometheus,jimmidyson/prometheus,agaoglu/prometheus,RobertKielty/prometheus,ton31337/prometheus,fabric8io/prometheus,keegancsmith/prometheus,kzittritsch/prometheus,slok/prometheus,slok/prometheus,eliothedeman/prometheus,trigrass2/prometheus,Conorbro/prometheus,thachmai/prometheus,sudhi-vm/prometheus,PrFalken/prometheus,dsymonds/prometheus,agaoglu/prometheus,prometheus/prometheus,agaoglu/prometheus,cit-lab/prometheus,iksaif/prometheus,Dieterbe/prometheus,ton31337/prometheus,wxdublin/prometheus,trigrass2/prometheus,wrouesnel/prometheus,datajet-io/prometheus,dln/prometheus,Gouthamve/prometheus,abhishekamralkar/prometheus,adamron1/prometheus,tattsun/prometheus,AlekSi/prometheus,dalanlan/prometheus,tattsun/prometheus,laushinka/prometheus,tattsun/prometheus,Stackdriver/stackdriver-prometheus,iksaif/prometheus,prometheus/prometheus,PrFalken/prometheus,GoogleCloudPlatform/prometheus,eliothedeman/prometheus,kangwoo/prometheus,Stackdriver/stackdriver-prometheus,GoogleCloudPlatform/prometheus,Gouthamve/prometheus,mrwacky42/prometheus,dsymonds/prometheus,dmilstein/prometheus,mtanda/prometheus,PrFalken/prometheus,nicr9/prometheus,gcnonato/prometheus,wxdublin/prometheus,kangwoo/prometheus,rajthilakmca/prometheus,wrouesnel/prometheus,sudhi-vm/prometheus,SaltedMan/prometheus-annotated,RobertKielty/prometheus,dpatel06/prometheus,jimmidyson/prometheus,fabric8io/prometheus,Stackdriver/stackdriver-prometheus,thachmai/prometheus,wxdublin/prometheus,wndhydrnt/prometheus,gcnonato/prometheus,kzittritsch/prometheus,prometheus/prometheus,jmcfarlane/prometheus,nicr9/prometheus,jbdalido/prometheus,amorken/prometheus,flier/prometheus,laushinka/prometheus,dln/prometheus,eliothedeman/prometheus,GoogleCloudPlatform/prometheus,Colstuwjx/prometheus,yanghongkjxy/prometheus,laushinka/prometheus,RobertKielty/prometheus,slok/prometheus,adamron1/prometheus,hustbill/prometheus,bluecmd/prometheus,gottwald/prometheus,abhishekamralkar/prometheus,Dieterbe/prometheus,jbdalido/prometheus,cit-lab/prometheus,prasincs/prometheus,trigrass2/prometheus,jmcfarlane/prometheus,thachmai/prometheus,abhishekamralkar/prometheus,wrouesnel/prometheus,wndhydrnt/prometheus,mtanda/prometheus,wndhydrnt/prometheus,AlekSi/prometheus,PrFalken/prometheus,robbiet480/prometheus,ton31337/prometheus,cit-lab/prometheus,amorken/prometheus,JavierZunzunegui/prometheus,prometheus/prometheus,keegancsmith/prometheus,SaltedMan/prometheus-annotated,robbiet480/prometheus,fabric8io/prometheus,msiebuhr/prometheus,keegancsmith/prometheus,thachmai/prometheus,tomwilkie/prometheus,mtanda/prometheus,alileza/prometheus,mrwacky42/prometheus,dln/prometheus,GoogleCloudPlatform/prometheus,prasincs/prometheus,alileza/prometheus,gottwald/prometheus,wrouesnel/prometheus,amorken/prometheus,yanghongkjxy/prometheus,GoogleCloudPlatform/prometheus,jbdalido/prometheus,brancz/prometheus,dmilstein/prometheus,msiebuhr/prometheus,jmcfarlane/prometheus,rajthilakmca/prometheus,kangwoo/prometheus,alileza/prometheus,flier/prometheus,tomwilkie/prometheus,adamron1/prometheus,jmcfarlane/prometheus,adamron1/prometheus,iksaif/prometheus,mrwacky42/prometheus,hustbill/prometheus,gottwald/prometheus,dalanlan/prometheus,dpatel06/prometheus,trigrass2/prometheus,gcnonato/prometheus,robbiet480/prometheus,abhishekamralkar/prometheus,Dieterbe/prometheus,brancz/prometheus,msiebuhr/prometheus,Gouthamve/prometheus,SaltedMan/prometheus-annotated,hustbill/prometheus,AlekSi/prometheus,dsymonds/prometheus,eliothedeman/prometheus,dmilstein/prometheus,sudhi-vm/prometheus,nicr9/prometheus,kzittritsch/prometheus,mtanda/prometheus,prasincs/prometheus,sudhi-vm/prometheus,iksaif/prometheus,dsymonds/prometheus,tattsun/prometheus,gottwald/prometheus,msiebuhr/prometheus,alileza/prometheus,gcnonato/prometheus,Gouthamve/prometheus,rajthilakmca/prometheus,Conorbro/prometheus,Colstuwjx/prometheus,dln/prometheus,brancz/prometheus,kzittritsch/prometheus,keegancsmith/prometheus,yanghongkjxy/prometheus,agaoglu/prometheus,bluecmd/prometheus