Make it so we can dynamically enable memory allocation debugging through the

environment variable OPENSSL_DEBUG_MEMORY (existence is sufficient).  At the
same time, it makes sure that CRYPTO_malloc_debug_init() gets expanded some-
where and thereby tested for compilation.

apps/openssl.c

@@ -101,6 +101,8 @@ int main(int Argc, char *Argv[])
 	arg.data=NULL;
 	arg.count=0;
 
+	if (getenv("OPENSSL_DEBUG_MEMORY") != NULL)
+		CRYPTO_malloc_debug_init();
 	CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 
 	apps_startup();