Switch to faster unordered_map/set

src/common.h

@@ -279,6 +279,11 @@ enum class NetworkType {
 	Stagenet,
 };
 
+void* malloc_hook(size_t n) noexcept;
+void* realloc_hook(void* ptr, size_t size) noexcept;
+void* calloc_hook(size_t count, size_t size) noexcept;
+void free_hook(void* p) noexcept;
+
 } // namespace p2pool
 
 #include "util.h"