change default renew days o 60.

fix https://github.com/Neilpang/acme.sh/issues/314
https://github.com/Neilpang/acme.sh/issues/281

acme.sh

@@ -27,7 +27,7 @@ VTYPE_TLS2="tls-sni-02"
 
 LOCAL_ANY_ADDRESS="0.0.0.0"
 
-MAX_RENEW=80
+MAX_RENEW=60
 
 DEFAULT_DNS_SLEEP=120