king: serf stderr goes to terminals.

pkg/hs/urbit-king/TODO.md

@@ -20,7 +20,7 @@ Bugs:
 
 - [ ] In non-daemon mode, serf slogs/stderr output that happens *before*
       the terminal connects should still go to stderr.
-- [ ] Serf stderr should also be send (along with slogs) to all connected
+- [x] Serf stderr should also be send (along with slogs) to all connected
       terminals.
 - [x] `king new` should reject pier directories that already exist.
 - [x] In non-daemon-mode, ^D doesn't bring down Urbit properly.
@@ -56,7 +56,7 @@ Polish:
 # Misc Bugs
 
 - [ ] `king run --collect-fx` flag does nothing. Remove or implement.
-- [ ] Handle ^C in connected terminals. It should interrupt current
+- [x] Handle ^C in connected terminals. It should interrupt current
       event (send SIGINT to serf, which will cause the current event to
       fail promptly).
 - [x] The terminal driver seems to have a race condition when spinner

pkg/hs/urbit-king/lib/Urbit/Vere/Pier.hs

@@ -132,7 +132,7 @@ runSerf vSlog pax fax = do
     , scPier = pax
     , scFlag = fax
     , scSlog = \(pri, tank) -> printTank slog pri tank
-    , scStdr = \line -> runRIO env $ logTrace (display ("SERF: " <> line))
+    , scStdr = \txt -> slog (txt <> "\r\n")
     , scDead = pure () -- TODO: What can be done?
     }