This resolves a number of issues that were keeping communications with
foreign ships from working.
- there was no link-update mark
- there was no +on-arvo handling in link-listen-hook
- link-listen-hook was subscribing to the non-existent "link-hook"
- link-proxy-hook permission check was looking at a wrong path
Also makes link-listen-hook aware that subscriptions might get rejected
because of permissions, so that it ignores failed subscriptions instead
of being loud about it.
link-server-hook exposes (parts of) the link-store over eyre, on the
condition that the client is authenticated as the host ship.
link-webext as committed is a very minimal web extension. When its
toolbar button is clicked, it saves the current webpage to /private
in the link-store.
In the future, this should support choosing a target to save to,
highlighting already-saved pages, and many other features.
Stores URLs and their titles for the local ship. Can listen to
"submissions" on foreign ships.
Has a primitive perspective on groups, treating them as
always-interesting. Auto-subscribes to all ships in all groups.
Foreign communications untested.
