Better IP Filter

Added

• Added /ipf check <ip> to show whether an IP is allowed and which whitelist entry matches it.
• Added /ipf addtemp <entry> <duration> [note] for temporary in-memory whitelist entries.
• Added optional notes for permanent whitelist entries via /ipf add <entry> [note].
• Added deny counters to /ipf status for not-whitelisted, proxy, rate-limit, and failsafe denies.
• Added tab completion for new commands and temporary durations.
• Added README proxy setup examples for standalone Paper, trusted proxy, Velocity, and invalid empty PROXY_GATE.

Changed

• /ipf add and /ipf remove now report normalized whitelist entries in command responses.
• /ipf list now shows one entry per line with optional note and temporary expiration details.
• Updated plugin metadata and documentation for the new commands.
• Bumped version to 1.4.4.

Security

• Hardened webhook destination validation by resolving webhook hosts before sending and blocking local/private DNS results when webhook.allow-local-addresses is false.

Compatibility

• No IPv6 support added in this release.
• Existing ips.yml list format remains compatible.
• Temporary entries are memory-only and do not survive server restarts.