router: Use strings for all HTTP API errors
router: Use strings for all HTTP API errors

This is a temporary measure until it is refactored to use httphelper.JSONError
so that error responses don’t get confused on the client side.

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

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