add dbmalloc epoch cleanup

--HG--
branch : fuzz

dbmalloc.h

@@ -0,0 +1,17 @@
+#ifndef DBMALLOC_H_
+#define DBMALLOC_H_
+
+#include "includes.h"
+
+void * m_malloc(size_t size);
+/* m_calloc is limited in size, enough for libtomcrypt */
+void * m_calloc(size_t nmemb, size_t size);
+void * m_strdup(const char * str);
+void * m_realloc(void* ptr, size_t size);
+void m_free_direct(void* ptr);
+#define m_free(X) do {m_free_direct(X); (X) = NULL;} while (0)
+
+void m_malloc_set_epoch(unsigned int epoch);
+void m_malloc_free_epoch(unsigned int epoch);
+
+#endif /* DBMALLOC_H_ */