Backward compatibility

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

@@ -56,7 +56,7 @@ import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory;
 // https://developer.android.com/topic/libraries/architecture/room.html
 
 @Database(
-        version = 124,
+        version = 125,
         entities = {
                 EntityIdentity.class,
                 EntityAccount.class,
@@ -1204,6 +1204,19 @@ public abstract class DB extends RoomDatabase {
                         db.execSQL("ALTER TABLE `identity` ADD COLUMN `provider` TEXT");
                     }
                 })
+                .addMigrations(new Migration(124, 125) {
+                    @Override
+                    public void migrate(@NonNull SupportSQLiteDatabase db) {
+                        Log.i("DB migration from version " + startVersion + " to " + endVersion);
+                        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
+                        int previous_version = prefs.getInt("previous_version", -1);
+                        if (previous_version <= 848 && Helper.isPlayStoreInstall()) {
+                            // JavaMail didn't check server certificates
+                            db.execSQL("UPDATE account SET insecure = 1 WHERE auth_type = " + MailService.AUTH_TYPE_PASSWORD);
+                            db.execSQL("UPDATE identity SET insecure = 1 WHERE auth_type = " + MailService.AUTH_TYPE_PASSWORD);
+                        }
+                    }
+                })
                 .build();
     }