[socket|doc] Add preliminary table caption
[socket|doc] Add preliminary table caption

Add preliminary (option) table captions.

OTP-14831

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