jael, azimuth: reconfigure jael for L2

Jael needs to be reconfigured to listen to the new aagent for azimuth
events, and the old app needs to be shut down. We do this in
/app/azimuth's +on-init.

Additionally, we make sure that jael doesn't crash when it (as expected)
loses its subscription to the old agent.

pkg/arvo/app/azimuth.hoon

@@ -59,7 +59,10 @@
     ^-  (quip card _this)
     =.  net.state  %local
     :_  this
-    [%pass /eth-watcher %agent [our.bowl %eth-watcher] %watch /logs/[dap.bowl]]~
+    :~  [%pass /eth-watcher %agent [our.bowl %eth-watcher] %watch /logs/[dap.bowl]]
+        [%pass /old-tracker %agent [our.bowl %azimuth-tracker] %poke %kiln-nuke !>([%azimuth-tracker %base])]
+        [%pass /lo %arvo %j %listen ~ [%| dap.bowl]]
+    ==
   ::
   ++  on-save   !>(state)
   ++  on-load

pkg/arvo/sys/vane/jael.hoon

@@ -314,7 +314,7 @@
       ::
       =.  +>.$  (poke-watch hen %azimuth nod.own.pki)
       =.  +>.$
-        ::  get everything from azimuth-tracker because jael subscriptions
+        ::  get everything from /app/azimuth because jael subscriptions
         ::  seem to be flaky for now
         ::
         ?:  &
@@ -548,7 +548,7 @@
         [%behn %wake *]
       ?^  error.hin
         %-  %+  slog
-              leaf+"jael unable to resubscribe, run :azimuth-tracker|listen"
+              leaf+"jael unable to resubscribe, run :azimuth|listen"
             u.error.hin
           +>.$
       ?>  ?=([%breach @ ~] tea)
@@ -565,7 +565,14 @@
         [%gall %unto *]
       ?-    +>-.hin
           %raw-fact  !!
-          %kick      ~|([%jael-unexpected-quit tea hin] !!)
+      ::
+          %kick
+        ?>  ?=([@ *] tea)
+        =*  app  i.tea
+        ::NOTE  we expect azimuth-tracker to be kill
+        ?:  =(%azimuth-tracker app)  +>.$
+        ~|([%jael-unexpected-quit tea hin] !!)
+      ::
           %poke-ack
         ?~  p.p.+>.hin
           +>.$