Make sure "struct timeval" is initialised on OS X to avoid valgrind warnings
Make hmac-sha2-256 and hmac-sha2-512 work
Add URL to usage text
update text about authorized_keys options
2013.56 changelog
Forgot date in CHANGES
Added tag DROPBEAR_2013.56 for changeset 1b8b2b9d6e94
Added signature for changeset 9b80981212fe