!rem #3765: Change the defaults for remoting

 - removed retry-window and related settings
 - removed gate-invalid-addresses-for
 - gate is now mandatory
 - remoting has a dedicated dispatcher by default
 - updated tests to work with changed timings
 - added doc section for association lifecycle
Merge pull request #1886 from drewhk/wip-3765-change-remoting-defaults-drewhk

!rem #3765: Change the defaults for remoting