use part of service buffer to make response not malloc
use part of service buffer to make response not malloc

Done with an offset because the encoded key is stored at the
start of service_buffer at this time

Signed-off-by: Andy Green <b471f5a494de34531c9e5a6e15abda71edd49104@linaro.org>
dtebbs/libwebsockets,DaYeSquad/libwebsockets,gameclosure/libwebsockets,SoapyMan/libwebsockets,sartura/libwebsockets,mralexgray/libwebsockets-xcode,SoapyMan/libwebsockets,pebble/libwebsockets,DaYeSquad/libwebsockets,JoakimSoderberg/libwebsockets,pombredanne/libwebsockets,mralexgray/libwebsockets-xcode,SoapyMan/libwebsockets,tn0502/libwebsockets,DaYeSquad/libwebsockets,cambridgehackers/libwebsockets,weimingtom/libwebsockets,turbulenz/libwebsockets,GroundControl-Solutions/libwebsockets,giovanni-liboni/libwebsockets,IOPOINT/libwebsockets,pankona/libwebsockets,maws/libwebsockets,gameclosure/libwebsockets,maws/libwebsockets,ralight/libwebsockets,sartura/libwebsockets,gameclosure/libwebsockets,Chilledheart/libwebsockets,dumganhar/libwebsockets,kaostao/libwebsockets,JoakimSoderberg/libwebsockets,GroundControl-Solutions/libwebsockets,pombredanne/libwebsockets,sartura/libwebsockets,weimingtom/libwebsockets,dtebbs/libwebsockets,abligh/libwebsockets,RobertoMalatesta/libwebsockets,giovanni-liboni/libwebsockets,Chilledheart/libwebsockets,lukasz-skalski/libwebsockets,wenqiwooo/syslog-libwebsockets,gameclosure/libwebsockets,IOPOINT/libwebsockets,mushroomgithub/libwebsockets,mushroomgithub/libwebsockets,Chilledheart/libwebsockets,kaostao/libwebsockets,wenqiwooo/syslog-libwebsockets,pebble/libwebsockets,jmillan/libwebsockets,turbulenz/libwebsockets,ralight/libwebsockets,dumganhar/libwebsockets,kaostao/libwebsockets,dumganhar/libwebsockets,JoakimSoderberg/libwebsockets,weimingtom/libwebsockets,lukasz-skalski/libwebsockets,sartura/libwebsockets,tn0502/libwebsockets,pombredanne/libwebsockets,RobertoMalatesta/libwebsockets,ralight/libwebsockets,wenqiwooo/syslog-libwebsockets,DaYeSquad/libwebsockets,mralexgray/libwebsockets-xcode,kaostao/libwebsockets,peeracle/libwebsockets,ralight/libwebsockets,abligh/libwebsockets,pankona/libwebsockets,canopy-project/libwebsockets-canopy,antmicro/libwebsockets,PureSwift/libwebsockets,PureSwift/libwebsockets,sanyaade-teachings/libwebsockets,tn0502/libwebsockets,lukasz-skalski/libwebsockets,pebble/libwebsockets,RobertoMalatesta/libwebsockets,RobertoMalatesta/libwebsockets,dtebbs/libwebsockets,maws/libwebsockets,mushroomgithub/libwebsockets,antmicro/libwebsockets,mushroomgithub/libwebsockets,ralight/libwebsockets,GroundControl-Solutions/libwebsockets,turbulenz/libwebsockets,dumganhar/libwebsockets,PureSwift/libwebsockets,SoapyMan/libwebsockets,IOPOINT/libwebsockets,PureSwift/libwebsockets,dumganhar/libwebsockets,PureSwift/libwebsockets,peeracle/libwebsockets,abligh/libwebsockets,abligh/libwebsockets,sartura/libwebsockets,peeracle/libwebsockets,giovanni-liboni/libwebsockets,GroundControl-Solutions/libwebsockets,antmicro/libwebsockets,peeracle/libwebsockets,giovanni-liboni/libwebsockets,canopy-project/libwebsockets-canopy,tn0502/libwebsockets,sanyaade-teachings/libwebsockets,cambridgehackers/libwebsockets,cambridgehackers/libwebsockets,canopy-project/libwebsockets-canopy,antmicro/libwebsockets,maws/libwebsockets,pombredanne/libwebsockets,cambridgehackers/libwebsockets,SoapyMan/libwebsockets,jmillan/libwebsockets,GroundControl-Solutions/libwebsockets,Chilledheart/libwebsockets,weimingtom/libwebsockets,peeracle/libwebsockets,sartura/libwebsockets,jmillan/libwebsockets,sanyaade-teachings/libwebsockets,dtebbs/libwebsockets,pankona/libwebsockets,JoakimSoderberg/libwebsockets,wenqiwooo/syslog-libwebsockets,mralexgray/libwebsockets-xcode,lukasz-skalski/libwebsockets,sartura/libwebsockets,pebble/libwebsockets,pankona/libwebsockets,jmillan/libwebsockets,DaYeSquad/libwebsockets,sanyaade-teachings/libwebsockets