Make node_persistent_cache class non-copyable and non-movable

node_persistent_cache has a handle to an open file internally, copying
or moving will not work without special handling. But we don't want to
copy or move it anyway, so just disabling that is okay.

Author: joto

src/node-persistent-cache.hpp

@@ -24,6 +24,12 @@ class node_persistent_cache
     node_persistent_cache(std::string file_name, bool remove_file);
     ~node_persistent_cache() noexcept;
 
+    node_persistent_cache(node_persistent_cache const &) = delete;
+    node_persistent_cache &operator=(node_persistent_cache const &) = delete;
+
+    node_persistent_cache(node_persistent_cache &&) = delete;
+    node_persistent_cache &operator=(node_persistent_cache &&) = delete;
+
     void set(osmid_t id, osmium::Location location);
     osmium::Location get(osmid_t id) const noexcept;