Release v5.1.0

[Comments]

2023/06/01: Free, Premium, v5.1, WPf2b

  • Web Application Firewall. Premium only
  • Add PTR record lookup to event report. Premium only
  • Improve report performance. Premium only
  • Site Health: Check `fail2ban` is running.
  • Site Health: Obsolete Filters - Detect DigitalOcean Droplet and link to documentation.
  • Fix harmless warning h/t @Yavor.
  • Fix warning caused by bug in Google Sitekit h/t @DaWolfey.
  • Update Freemius library.