Added notice about ACL option requirement

README.md

@@ -64,7 +64,7 @@ where yourdomain.com is the primary domain name that you want to create a certif
 
 You can then edit ~/.getssl/getssl.cfg to set the values you want as the default for the majority of your certificates.
 
-Then edit ~/.getssl/yourdomain.com/getssl.cfg to have the values you want for this specific domain.
+Then edit ~/.getssl/yourdomain.com/getssl.cfg to have the values you want for this specific domain (make sure to uncomment and specify correct `ACL` option, since it is required).
 
 You can then just run;