use context service buffer instead of stack for server_socket_service
use context service buffer instead of stack for server_socket_service

Reduces lws_server_socket_service from 4208 to 80 stack allocation
on x86_64

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