controller/client: return more verbose errors
controller/client: return more verbose errors

Signed-off-by: Jonathan Rudenberg <3692bfa45759a67d83aedf0045f6cb635a966abf@titanous.com>

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