doc add explanation missing from per context provate data
doc add explanation missing from per context provate data

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