sdutil: update to go-discover api. also -1 option for services subcommand
sdutil: update to go-discover api. also -1 option for services subcommand

Brandywine2161/flynn,rikur/flynn,schatt/flynn,felixrieseberg/flynn,kgrz/flynn,arekkas/flynn,supermario/flynn,flynn/flynn,clifff/flynn,rikur/flynn,philiplb/flynn,supermario/flynn,pkdevbox/flynn,technosophos/flynn,whouses/flynn,felixrieseberg/flynn,rikur/flynn,philiplb/flynn,clifff/flynn,benbjohnson/flynn,justintung/flynn,benbjohnson/flynn,shads196770/flynn,felixrieseberg/flynn,arekkas/flynn,benbjohnson/flynn,ozum/flynn,pkdevbox/flynn,justintung/flynn,felixrieseberg/flynn,supermario/flynn,schatt/flynn,lmars/flynn,TribeMedia/flynn,shads196770/flynn,ozum/flynn,kgrz/flynn,schatt/flynn,lmars/flynn,whouses/flynn,mubassirhayat/flynn,justintung/flynn,Brandywine2161/flynn,whouses/flynn,GrimDerp/flynn,josephglanville/flynn,flynn/flynn,arekkas/flynn,pkdevbox/flynn,tonicbupt/flynn,TribeMedia/flynn,josephglanville/flynn,flynn/flynn,rikur/flynn,TribeMedia/flynn,josephglanville/flynn,jzila/flynn,philiplb/flynn,benbjohnson/flynn,shads196770/flynn,ozum/flynn,technosophos/flynn,TribeMedia/flynn,mubassirhayat/flynn,GrimDerp/flynn,shutej/flynn,justintung/flynn,kgrz/flynn,jzila/flynn,GrimDerp/flynn,clifff/flynn,philiplb/flynn,GrimDerp/flynn,pkdevbox/flynn,tonicbupt/flynn,tonicbupt/flynn,supermario/flynn,flynn/flynn,clifff/flynn,lmars/flynn,tonicbupt/flynn,technosophos/flynn,GrimDerp/flynn,shads196770/flynn,flynn/flynn,benbjohnson/flynn,schatt/flynn,kgrz/flynn,whouses/flynn,philiplb/flynn,justintung/flynn,tonicbupt/flynn,clifff/flynn,kgrz/flynn,benbjohnson/flynn,josephglanville/flynn,supermario/flynn,Brandywine2161/flynn,whouses/flynn,GrimDerp/flynn,rikur/flynn,jzila/flynn,jzila/flynn,Brandywine2161/flynn,ozum/flynn,justintung/flynn,mubassirhayat/flynn,shads196770/flynn,josephglanville/flynn,ozum/flynn,kgrz/flynn,lmars/flynn,ozum/flynn,rikur/flynn,technosophos/flynn,pkdevbox/flynn,Brandywine2161/flynn,pkdevbox/flynn,Brandywine2161/flynn,supermario/flynn,josephglanville/flynn,shads196770/flynn,TribeMedia/flynn,schatt/flynn,jzila/flynn,arekkas/flynn,arekkas/flynn,jzila/flynn,mubassirhayat/flynn,lmars/flynn,schatt/flynn,felixrieseberg/flynn,whouses/flynn,clifff/flynn,TribeMedia/flynn,technosophos/flynn