fix _exists
Dev
minor, message typo
run acmetest project in CI
Documentation cleanup
sync
nsupdate
fix 'sed -i' permissions on PVE
Add shfmt to format source code
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