workaround to a minor bug in mux which filters out empty query
workaround to a minor bug in mux which filters out empty query

Signed-off-by: Madhu Venugopal <d22477479bbf55ba62bd822f4112c80f292c7805@docker.com>

wulonghui/libnetwork,kolyshkin/libnetwork,argvader/libnetwork,abronan/libnetwork,wcwxyz/libnetwork,vdemeester/libnetwork,djones-skytap/libnetwork,medallia/libnetwork,mahak/libnetwork,vijayendrabvs/libnetwork,medallia/libnetwork,bprashanth/libnetwork,cpuguy83/libnetwork,YujiOshima/libnetwork,sainath14/libnetwork,hw-qiaolei/libnetwork,wcwxyz/libnetwork,djones-skytap/libnetwork,mountkin/libnetwork,jmzwcn/libnetwork,frntn/libnetwork,anortef/libnetwork,chenchun/libnetwork,jimmycmh/libnetwork,WeiZhang555/libnetwork,kunalkushwaha/libnetwork,ycaihua/libnetwork,anortef/libnetwork,vijayendrabvs/libnetwork,runcom/libnetwork,axsh/libnetwork,brewertribe/libnetwork,sharmasushant/libnetwork,tangkun75/libnetwork,curtiszimmerman/libnetwork,aboch/libnetwork_new,mbanikazemi/libnetwork,rogaha/libnetwork,anarcher/libnetwork,ycaihua/libnetwork,pyakpyak/libnetwork,junxu/libnetwork,ityangchen/libnetwork,tgraf/libnetwork,mahak/libnetwork,mountkin/libnetwork,YujiOshima/libnetwork,calavera/libnetwork,abronan/libnetwork,abhi/libnetwork,thockin/libnetwork,calavera/libnetwork,msagheer/libnetwork,runcom/libnetwork,anarcher/libnetwork,brahmaroutu/libnetwork,coolljt0725/libnetwork,allencloud/libnetwork,sainath14/libnetwork,msabansal/libnetwork,msagheer/libnetwork,AdoHe/libnetwork,frntn/libnetwork,abhi/libnetwork,fcrisciani/libnetwork,fcrisciani/libnetwork,clnperez/libnetwork,jvinod/libnetwork,hw-qiaolei/libnetwork,mahak/libnetwork,carlye566/libnetwork,clnperez/libnetwork,sharmasushant/libnetwork,tangkun75/libnetwork,AdoHe/libnetwork,thockin/libnetwork,chenchun/libnetwork,carlye566/libnetwork_eric,hackersdotmu/libnetwork,cpuguy83/libnetwork,cloudflare/libnetwork,carlye566/libnetwork,sanimej/libnetwork,kvasdopil/libnetwork,docker/libnetwork,msabansal/libnetwork,mavenugo/libnetwork,docker/libnetwork,jimmycmh/libnetwork,cloudflare/libnetwork,rogaha/libnetwork,kunalkushwaha/libnetwork,mavenugo/libnetwork,kolyshkin/libnetwork,abhi/libnetwork,tmakita/libnetwork,anshulr/libnetwork,allencloud/libnetwork,hackersdotmu/libnetwork,aboch/libnetwork_new,minhoryang/libnetwork,junxu/libnetwork,curtiszimmerman/libnetwork,mapuri/libnetwork,coolljt0725/libnetwork,axsh/libnetwork,tgraf/libnetwork,lindenlab/libnetwork,WeiZhang555/libnetwork,tmakita/libnetwork,minhoryang/libnetwork,amitkris/libnetwork,jvinod/libnetwork,bprashanth/libnetwork,wulonghui/libnetwork,lindenlab/libnetwork,vdemeester/libnetwork,mapuri/libnetwork,kolyshkin/libnetwork,carlye566/libnetwork_eric,vdemeester/libnetwork,medallia/libnetwork,sanimej/libnetwork,docker/libnetwork,argvader/libnetwork,mYmNeo/libnetwork,kvasdopil/libnetwork,amitkris/libnetwork,dcbw/libnetwork,mbanikazemi/libnetwork,brewertribe/libnetwork,ityangchen/libnetwork,pyakpyak/libnetwork,jmzwcn/libnetwork,dcbw/libnetwork,anshulr/libnetwork,brahmaroutu/libnetwork,mYmNeo/libnetwork