Treat nested EOFException as transient

Author: grote

core/src/main/java/org/calyxos/seedvault/core/backends/webdav/WebDavBackend.kt

@@ -361,6 +361,12 @@ public class WebDavBackend(
             return true
         } else if (e is EOFException && e.message?.contains("\\n not found") == true) {
             return true
+        } else if (e is IOException && e.cause is EOFException &&
+            e.message?.contains("\\n not found") == true
+        ) {
+            return true
+        } else if (e is IOException && e.message?.contains("unexpected end of stream") == true) {
+            return true
         }
         return false
     }

storage/lib/src/main/java/org/calyxos/backup/storage/api/StorageBackup.kt

@@ -191,6 +191,8 @@ public class StorageBackup(
             if (checkRunning.get() || !backupRunning.compareAndSet(false, true)) {
                 Log.w(TAG, "Backup or check already running, not starting a new one")
                 return@withContext false
+            } else {
+                Log.i(TAG, "Backup started, running set.")
             }
             try {
                 backup.runBackup(backupObserver)