[megaco|tcp-tranport|doc] Add description of the new backend option
[megaco|tcp-tranport|doc] Add description of the new backend option

Add description of the new 'inet_backend' (udp transport) option.

OTP-17533

getong/otp,dumbbell/otp,potatosalad/otp,vinoski/otp,potatosalad/otp,bjorng/otp,mikpe/otp,vinoski/otp,mikpe/otp,jj1bdx/otp,rlipscombe/otp,vinoski/otp,rlipscombe/otp,vinoski/otp,dumbbell/otp,potatosalad/otp,rlipscombe/otp,emacsmirror/erlang,dumbbell/otp,jj1bdx/otp,dgud/otp,getong/otp,erlang/otp,getong/otp,ferd/otp,erlang/otp,jj1bdx/otp,jj1bdx/otp,bjorng/otp,rlipscombe/otp,dgud/otp,isvilen/otp,ferd/otp,rlipscombe/otp,dumbbell/otp,getong/otp,jj1bdx/otp,isvilen/otp,erlang/otp,g-andrade/otp,rlipscombe/otp,g-andrade/otp,rlipscombe/otp,vinoski/otp,bjorng/otp,getong/otp,dgud/otp,bjorng/otp,potatosalad/otp,g-andrade/otp,bjorng/otp,jj1bdx/otp,isvilen/otp,potatosalad/otp,mikpe/otp,emacsmirror/erlang,isvilen/otp,vinoski/otp,vinoski/otp,emacsmirror/erlang,getong/otp,isvilen/otp,isvilen/otp,emacsmirror/erlang,mikpe/otp,dumbbell/otp,g-andrade/otp,emacsmirror/erlang,emacsmirror/erlang,vinoski/otp,mikpe/otp,jj1bdx/otp,emacsmirror/erlang,ferd/otp,erlang/otp,mikpe/otp,bjorng/otp,g-andrade/otp,erlang/otp,mikpe/otp,getong/otp,rlipscombe/otp,jj1bdx/otp,g-andrade/otp,ferd/otp,rlipscombe/otp,emacsmirror/erlang,ferd/otp,erlang/otp,jj1bdx/otp,erlang/otp,potatosalad/otp,bjorng/otp,getong/otp,g-andrade/otp,erlang/otp,vinoski/otp,dumbbell/otp,potatosalad/otp,dumbbell/otp,dgud/otp,potatosalad/otp,isvilen/otp,mikpe/otp,ferd/otp,getong/otp,bjorng/otp,dgud/otp,dumbbell/otp,rlipscombe/otp,isvilen/otp,dgud/otp,vinoski/otp,isvilen/otp,dgud/otp,ferd/otp,ferd/otp,g-andrade/otp,dumbbell/otp,mikpe/otp,potatosalad/otp,mikpe/otp,g-andrade/otp,g-andrade/otp,bjorng/otp,isvilen/otp,emacsmirror/erlang,potatosalad/otp,dumbbell/otp,dgud/otp,ferd/otp,bjorng/otp,erlang/otp,erlang/otp,dgud/otp,getong/otp,emacsmirror/erlang,dgud/otp,jj1bdx/otp