dill: add scry endpoints for session discovery
=(%$ syd)
==
~
- ::TODO scry endpoints for /sessions
- ~
+ :: /dy/sessions (set @tas) all existing sessions
+ :: /du/sessions/[ses] ? does session ses exist?
+ ::
+ ?+ [ren tyl] ~
+ [%y %sessions ~] ``noun+!>(~(key by dug.all))
+ [%u %sessions @ ~] ``noun+!>((~(has by dug.all) (snag 1 tyl)))
+ ==
::
++ stay all
::
