Add port/package URL for py-acme
Use Freshports URL's instead of SVNWeb (repository) links as they provide (binary) package installation installation as well as further port/package information such as vulnerabilities, revision history and bug reports for each port respectively.
Correct tagging format.
Add request for random offsets for renewal.
Make all bulleted lists consistent.
Remove obsolete `letsencrypt` package for Fedora.
Remove discouraged letshelp-certbot package.