Adding some documentation for OAuth signing support.
Adding some documentation for OAuth signing support.

calibr/request,motopia/request,djchie/request,manishnakar/request,request/request,simov/request,Aloomaio/request,xtidt/request,xtidt/request,kublaj/request,lalitkapoor/request,faradayio/request,robu3/request,niklabh/request,czardoz/request,MofeLee/request,NewGyu/request,longwenjunjie/request,mvnnn/request,HAKASHUN/request,sean3z/request,Jonekee/request,zodsoft/request,blabno/request,watson/request,seegno-forks/request,calibr/request,kublaj/request,wakermahmud/request,LoicMahieu/request,simov/request,IveWong/request,xiwc/request,lxe/request,cvibhagool/request,Prasanna-sr/request,kevinburke/request,wakermahmud/request,sean3z/request,beni55/request,chaoliu/request,lalitkapoor/request,wangchi/request,seegno-forks/request,IbpTeam/node-request,ryanwholey/request,zhouweiming/request,blabno/request,phillipj/request,wangchi/request,zodsoft/request,jsifuentes/request,neo-z/request,linalu1/request,pablobrady/request,bigeasy/request,djchie/request,nishant8BITS/request,kmulvey/request,watson/request,whembed197923/request,phillipj/request,h1bomb/request,substack/request,robu3/request,pablobrady/request,whembed197923/request,Prasanna-sr/request,jzaefferer/request,request/request,pho3nixf1re/request,zhouweiming/request,Jonekee/request,paulomcnally/request,lxe/request,Aloomaio/request,rbramwell/request,h1bomb/request,mvnnn/request,substack/request,MofeLee/request,IbpTeam/node-request,not001praween001/request,jzaefferer/request,longwenjunjie/request,motopia/request,HAKASHUN/request,udp/request,manishnakar/request,LoicMahieu/request,niklabh/request,kevinburke/request,xiwc/request,paulomcnally/request,nishant8BITS/request,not001praween001/request,Codelegant92/request,rbramwell/request,kmulvey/request,IveWong/request,chaoliu/request,NewGyu/request,jsifuentes/request,pho3nixf1re/request,ryanwholey/request,beni55/request,udp/request,linalu1/request,Codelegant92/request,faradayio/request,neo-z/request,cvibhagool/request,czardoz/request