Consider mac connections as I/O error

app/src/main/java/eu/faircode/email/Core.java

@@ -3401,7 +3401,6 @@ class Core {
         private Semaphore semaphore = new Semaphore(0);
         private boolean running = true;
         private boolean recoverable = true;
-        private boolean maxConnections = false;
         private Long lastActivity = null;
 
         private Map<FolderPriority, Long> sequence = new HashMap<>();
@@ -3471,17 +3470,8 @@ class Core {
             yield();
         }
 
-        void setMaxConnections() {
-            maxConnections = true;
-        }
-
-        boolean getMaxConnections() {
-            return maxConnections;
-        }
-
         void reset() {
             recoverable = true;
-            maxConnections = false;
             lastActivity = null;
             synchronized (this) {
                 for (FolderPriority key : sequence.keySet()) {

app/src/main/java/eu/faircode/email/ServiceSynchronize.java

@@ -873,10 +873,7 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
 
                                 EntityLog.log(ServiceSynchronize.this, account.name + " alert: " + message);
 
-                                boolean max = isMaxConnections(message);
-                                if (max)
-                                    state.setMaxConnections();
-                                if (!max || state.getBackoff() > CONNECT_BACKOFF_MAX)
+                                if (!isMaxConnections(message))
                                     try {
                                         NotificationManager nm = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
                                         nm.notify("alert:" + account.id, 1,
@@ -906,10 +903,7 @@ public class ServiceSynchronize extends ServiceBase implements SharedPreferences
                             boolean ioError = false;
                             Throwable c = ex;
                             while (c != null) {
-                                boolean max = isMaxConnections(c.getMessage());
-                                if (max)
-                                    state.setMaxConnections();
-                                if (max ||
+                                if (isMaxConnections(c.getMessage()) ||
                                         c instanceof IOException ||
                                         c instanceof ConnectionException ||
                                         c instanceof AccountsException ||