Simple utility that tells you expiration dates for all the domains specified in a zonefile.
This tool is motivated by the problem many orgs often face with expiring certificates. Please note that a better solution to this problem is to use managed certificates like Lets Encrypt. However, many organizations continue to rely on manually provisioned ssl certs for various reasons, and this tool is meant to assist in maintaining them.
go run main.go <ZONEFILE>This will print a table of domains, with their expiration dates.