proxyctl clearing counters

wet:~# ./proxyctl "clear counters"

wet:~# ./proxyctl "show stat" 
# pxname,svname,qcur,qmax,scur,smax,slim,stot,bin,bout,dreq,dresp,ereq,econ,eresp,wretr,wredis,status,weight,act,bck,chkfail,chkdown,lastchg,downtime,qlimit,pid,iid,sid,throttle,lbtot,tracked,type,rate,rate_lim,rate_max,check_status,check_code,check_duration,hrsp_1xx,hrsp_2xx,hrsp_3xx,hrsp_4xx,hrsp_5xx,hrsp_other,hanafail,req_rate,req_rate_max,req_tot,cli_abrt,srv_abrt,
http,FRONTEND,,,0,0,5000,60,39346,20559128,0,0,2,,,,,OPEN,,,,,,,,,1,1,0,,,,0,0,0,0,,,,0,73,22,4,0,0,,0,0,99,,,
apache,wet,0,0,0,0,,2,853,2348,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,2,1,,2,,2,0,,0,L4OK,,0,0,2,0,0,0,0,0,,,,0,0,
apache,BACKEND,0,0,0,0,0,2,853,2348,0,0,,0,0,0,0,UP,1,1,0,,0,5748,0,,1,2,0,,2,,1,0,,0,,,,0,2,0,0,0,0,,,,,0,0,
sinatra,sinatra_downoi,0,0,0,0,,5,2640,15872,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,3,1,,5,,2,0,,0,L4OK,,46,0,5,0,0,0,0,0,,,,0,0,
sinatra,sinatra_rindica,0,0,0,0,,4,2168,9054,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,3,2,,4,,2,0,,0,L4OK,,46,0,3,0,1,0,0,0,,,,0,0,
sinatra,sinatra_wet,0,0,0,0,,4,2522,10862,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,3,3,,4,,2,0,,0,L4OK,,0,0,4,0,0,0,0,0,,,,0,0,
sinatra,BACKEND,0,0,0,0,0,13,7330,35788,0,0,,0,0,0,0,UP,3,3,0,,0,5748,0,,1,3,0,,13,,1,0,,0,,,,0,12,0,1,0,0,,,,,0,0,
static,ngnix_downoi,0,0,0,0,,19,7385,5390953,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,4,1,,19,,2,0,,0,L4OK,,46,0,12,6,1,0,0,0,,,,1,0,
static,ngnix_rindica,0,0,0,0,,19,6608,4852342,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,4,2,,19,,2,0,,0,L4OK,,46,0,14,5,0,0,0,0,,,,4,0,
static,nginx_stellatus,0,0,0,0,,0,0,0,,0,,0,0,0,0,MAINT,1,1,0,0,1,5712,5712,,1,4,3,,0,,2,0,,0,INI,,,0,0,0,0,0,0,0,,,,0,0,
static,nginx_belem,0,0,0,0,,19,7026,1386468,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,4,4,,19,,2,0,,0,L4OK,,42,0,14,5,0,0,0,0,,,,2,0,
static,apache_wet,0,0,0,0,,19,7155,8783404,,0,,0,0,0,0,UP,1,1,0,0,0,5748,0,,1,4,5,,19,,2,0,,0,L4OK,,0,0,13,6,0,0,0,0,,,,4,0,
static,BACKEND,0,0,0,0,0,76,28174,20413167,0,0,,0,0,0,0,UP,4,4,0,,0,5748,0,,1,4,0,,76,,1,0,,0,,,,0,53,22,1,0,0,,,,,11,0,