Add main() test methods to reduce test boilerplate.

Simple tests only need to implement register_tests().
Tests that need a custom main() should implement test_main(). This will
be wrapped in a main() that performs common setup/teardown (currently
crypto-mdebug).

Note that for normal development, enable-asan is usually
sufficient for detecting leaks, and more versatile.

enable-crypto-mdebug is stricter as it will also
insist that all static variables be freed. This is useful for debugging
library init/deinit; however, it also means that test_main() must free
everything it allocates.

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>

test/cipherlist_test.c

diff --git a/test/cipherlist_test.c b/test/cipherlist_test.c
index b5dd7d9..40596bc 100644
--- a/test/cipherlist_test.c
+++ b/test/cipherlist_test.c
@@ -18,6 +18,7 @@
 #include <openssl/tls1.h>
 
 #include "e_os.h"
+#include "test_main.h"
 #include "testutil.h"
 
 typedef struct cipherlist_test_fixture {
@@ -189,14 +190,8 @@
     EXECUTE_CIPHERLIST_TEST();
 }
 
-int main(int argc, char **argv)
+void register_tests()
 {
-    int result = 0;
-
     ADD_TEST(test_default_cipherlist_implicit);
     ADD_TEST(test_default_cipherlist_explicit);
-
-    result = run_tests(argv[0]);
-
-    return result;
 }