Dev
bash support for luadns api
add APACHE_HTTPD_CONF
https://github.com/Neilpang/acme.sh/issues/363
set default account key to 2048.
Some old platforms doesn't support ecc signing.
minor, add more log
add issue template
add more error check
minor
fix performance
* rename JWK_HEADER * fix performance * fix performance, use cached nonce * do not register account if already registered * fix thumbprint * minor, reduce the sleep time.