net/eternalterminal: Update to 6.2.4

ChangeLog:
https://github.com/MisterTea/EternalTerminal/compare/et-v6.2.1...et-v6.2.4

• CVE-2022-48257, CVE-2022-48258 remedied
• fix readme regarding port forwarding
• Fix test failures that started appearing in CI
• Add documentation for the EternalTerminal protocol
• ssh-et: apply upstream updates
• docs: write gpg key to trusted.gpg.d for APT
• Support for ipv6 addresses (with or without port specified)
• ipv6 abbreviated address support
• Fix launchd plist config to remove daemonization.
• Explicitly set verbosity from cxxopts value.
• Remove daemon flag in systemd config
• Format all source with clang-format.
• Fix tunnel parsing exception handling.
• Fix SIGTERM behavior that causes systemd control of etserver to timeout.
• Parse telemetry ini config as boolean and make telemetry opt-in.
• Logfile open mode and permission plus location configurability.

PR: 269079
Reported by: willtisdale@gmail.com (maintainer)
MFH: 2023Q1 (security fixes)
Security: CVE-2022-48257, CVE-2022-48258

(cherry picked from commit 2a6cc6635b837b263eef5058ecc822b82d23ceb8)