fix: mutex leak, errno-after-free, log_perror misuse, status validation

- multiprocessing: destroy mutex_progress on the dir_entries_mutex
  init-failure path (init >= 7); drop bogus log_perror
- delete_plan: capture errno before free() in apply_deferred_path
- queue/array_list: log_message instead of log_perror for non-errno
  conditions
- protocol: reject unknown wire Status values via status_is_valid() in
  receive_status, receive_status_timed and the keepalive reader; declare
  protocol_receive_status_timed in protocol.h
- protocol: %llu for unsigned long long debug counters
- tests: out-of-range status rejection test

src/shared/array_list.c

@@ -9,7 +9,7 @@
 ArrayList* array_list_create(void (*item_destroyer)(void* item)) {
   ArrayList* list = (ArrayList*)protocol_alloc(sizeof(ArrayList));
   if (list == NULL) {
-    log_perror("ERROR: Could not allocate memory for array list struct");
+    log_message(LOG_LEVEL_ERROR, "%s", "ERROR: Could not allocate memory for array list struct");
     return NULL;
   }
 
@@ -47,7 +47,7 @@ static bool array_list_extend(ArrayList* array_list) {
     new_capacity = INITIAL_ARRAY_SIZE;
   void* new_items = protocol_realloc(array_list->items, new_capacity * sizeof(void*));
   if (new_items == NULL) {
-    log_perror("ERROR: Could not reallocate memory for array list items");
+    log_message(LOG_LEVEL_ERROR, "%s", "ERROR: Could not reallocate memory for array list items");
     return false;
   }
   array_list->items = new_items;
@@ -73,7 +73,7 @@ void** array_list_to_array(const ArrayList* array_list) {
   }
   void** array = protocol_alloc(array_list->size * sizeof(void*));
   if (array == NULL) {
-    log_perror("Could not malloc space for array from array list!");
+    log_message(LOG_LEVEL_ERROR, "%s", "Could not malloc space for array from array list!");
     return NULL;
   }
   memcpy(array, array_list->items, array_list->size * sizeof(void*));