fix: passive health check + hop=0 in stabilization pass

Active PINGs on pineapd's command socket collided with the stock daemon's
own socket writes ('[PineAp] Error writing'), making the daemon watchdog
SIGTERM pineapd every ~30s while hopping. Monitor now checks pidof only
(no socket writes) and the stabilization pass pins wlan1mon hop=0.

tests/test_health.py

@@ -26,10 +26,10 @@ class HealthCheckTest(unittest.TestCase):
         def fake_run(args, timeout=20, input_data=None):
             self.runs.append((list(args), timeout))
             a = list(args)
-            if a[0] == '/usr/bin/hak5cmd' and a[1] == 'PING':
+            if a[0] == 'pidof' and a[1] == 'pineapd':
                 if self.ping_ok:
-                    return (0, 'Sending PING...\nGot PONG response\n', '')
-                return (1, '', 'could not connect to pineap: connection refused')
+                    return (0, '12345\n', '')
+                return (1, '', '')
             if a[0] == 'logread':
                 return (0, 'SIGSEGV\n' * self.sigsegs if hasattr(self, 'sigsegs') else '', '')
             if a[:2] == ['uci', 'set']:
@@ -56,6 +56,8 @@ class HealthCheckTest(unittest.TestCase):
         result = server.health_check()
         self.assertTrue(result['pineap_up'])
         self.assertIsNone(result['last_action'])
+        self.assertEqual([r[0] for r in self.runs], [['pidof', 'pineapd']],
+                         'health check must not write to the pineapd socket')
 
     def test_down_with_growing_sigsegv_disables_pool(self):
         self.ping_ok = False
@@ -73,6 +75,7 @@ class HealthCheckTest(unittest.TestCase):
         self.uci_state['pineapd.wlan2mon.hop'] = '0'
         self.uci_state['pineapd.wlan1mon.bands'] = '5'
         self.uci_state['pineapd.wlan0mon.bands'] = '2'
+        self.uci_state['pineapd.wlan1mon.hop'] = '0'
         result = server.health_check()
         self.assertEqual(result['last_action'], 'pineapd restart')
         self.assertIn(['/etc/init.d/pineapd', 'restart'], [r[0] for r in self.runs])