erts: Expand docs about +A, +SDcpu and +SDio
erts: Expand docs about +A, +SDcpu and +SDio

dumbbell/otp,vinoski/otp,g-andrade/otp,jj1bdx/otp,dumbbell/otp,jj1bdx/otp,vladdu/otp,mikpe/otp,potatosalad/otp,isvilen/otp,isvilen/otp,rlipscombe/otp,dumbbell/otp,ferd/otp,g-andrade/otp,erlang/otp,rlipscombe/otp,isvilen/otp,dgud/otp,erlang/otp,dgud/otp,erlang/otp,bjorng/otp,ferd/otp,electricimp/otp,uabboli/otp,vinoski/otp,vinoski/otp,rlipscombe/otp,isvilen/otp,potatosalad/otp,emacsmirror/erlang,kvakvs/otp,ferd/otp,dumbbell/otp,getong/otp,emacsmirror/erlang,kvakvs/otp,mikpe/otp,g-andrade/otp,vladdu/otp,potatosalad/otp,isvilen/otp,dgud/otp,rlipscombe/otp,ferd/otp,electricimp/otp,mikpe/otp,mikpe/otp,lrascao/otp,kvakvs/otp,jj1bdx/otp,kvakvs/otp,kvakvs/otp,electricimp/otp,dgud/otp,isvilen/otp,uabboli/otp,erlang/otp,bjorng/otp,potatosalad/otp,jj1bdx/otp,jj1bdx/otp,potatosalad/otp,bjorng/otp,dumbbell/otp,lrascao/otp,electricimp/otp,bjorng/otp,rlipscombe/otp,jj1bdx/otp,jj1bdx/otp,vladdu/otp,isvilen/otp,rlipscombe/otp,bjorng/otp,dumbbell/otp,dumbbell/otp,kvakvs/otp,dgud/otp,mikpe/otp,rlipscombe/otp,getong/otp,isvilen/otp,potatosalad/otp,electricimp/otp,electricimp/otp,dumbbell/otp,erlang/otp,bjorng/otp,lrascao/otp,uabboli/otp,getong/otp,dgud/otp,rlipscombe/otp,erlang/otp,jj1bdx/otp,g-andrade/otp,bjorng/otp,ferd/otp,ferd/otp,potatosalad/otp,lrascao/otp,ferd/otp,getong/otp,g-andrade/otp,jj1bdx/otp,potatosalad/otp,ferd/otp,mikpe/otp,jj1bdx/otp,vinoski/otp,dgud/otp,potatosalad/otp,vladdu/otp,lrascao/otp,bjorng/otp,dgud/otp,emacsmirror/erlang,erlang/otp,getong/otp,emacsmirror/erlang,vinoski/otp,getong/otp,emacsmirror/erlang,rlipscombe/otp,getong/otp,uabboli/otp,emacsmirror/erlang,bjorng/otp,kvakvs/otp,lrascao/otp,vinoski/otp,vladdu/otp,uabboli/otp,mikpe/otp,electricimp/otp,g-andrade/otp,mikpe/otp,getong/otp,getong/otp,uabboli/otp,g-andrade/otp,vladdu/otp,mikpe/otp,getong/otp,emacsmirror/erlang,vinoski/otp,ferd/otp,vinoski/otp,bjorng/otp,uabboli/otp,g-andrade/otp,vladdu/otp,vinoski/otp,emacsmirror/erlang,potatosalad/otp,vladdu/otp,electricimp/otp,uabboli/otp,erlang/otp,emacsmirror/erlang,uabboli/otp,erlang/otp,vinoski/otp,kvakvs/otp,isvilen/otp,lrascao/otp,lrascao/otp,emacsmirror/erlang,mikpe/otp,rlipscombe/otp,kvakvs/otp,electricimp/otp,dumbbell/otp,vladdu/otp,g-andrade/otp,erlang/otp,dumbbell/otp,g-andrade/otp,dgud/otp,dgud/otp,lrascao/otp,isvilen/otp