fix https://github.com/Neilpang/acme.sh/issues/939
Add 'dns_dyn' DNS challenge validation script for Dyn Managed DNS API, Issue #594
dns_dyn.sh, remove empty line at end dns_dyn.sh, remove trailing spaces at end of line Replace 'head -n' with the '_head_n' function Update main README.md DNS API list
minor, fix format
Dev
don't trigger validation for dns manually mode
Fix for Name.com API
Fix README.md for DNS API.
Updated README.md for Name.com API application.
DuckDNS.org and Name.com DNS API support