Inventory cleanup; add ipt-server host_vars for all ipt hosts.

- hosts: remove unreachable/decommissioned hosts (file-ah-neu, file-ah-alt,
  file-km-neu, ga-al-gw-neu, gw-opp-neu, zapata-neu, zapata-alt, bbb-server,
  ki-fm, server28, ...) and duplicate aliases (etherpad = b.ns,
  cl-irights-neu = cl-irights, oolm-db = o21, devel-ruby = devel-todo).
- host_vars: add <short>-ipt-server.yml (fw_manage_config: false) for all
  hosts running the ipt-server firewall, generated by extract-fw-host-vars.py.
- host_vars: move/remove obsolete host directories, replace alias
  directories by symlinks (cl-lubax -> o32, cl-vbrg -> o34, oolm-db -> o21).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

host_vars/meet.oopen.de/meet-ipt-server.yml

@@ -0,0 +1,29 @@
+---
+# ipt-firewall configuration for meet.oopen.de
+# Generated by extract-fw-host-vars.py - review before committing!
+# Place in: host_vars/<hostname>/<short-hostname>-ipt-server.yml
+
+fw_manage_config: false
+
+# --- Network
+fw_ext_interfaces:
+  - "eth0"
+fw_ext_ips_v4:
+  - "159.69.74.155"
+fw_ext_ips_v6:
+  - "2a01:4f8:231:19a7::155"
+
+# --- Munin
+munin_remote_ipv4: 37.27.121.227
+munin_remote_ipv6: "2a01:4f9:3070:2bda::227"
+
+# --- HTTP
+fw_http_server_ips: $ext_1_ip
+
+# --- Mail
+fw_mail_client_ips: $ext_1_ip
+
+# --- Jitsi
+fw_jitsi_server_ips: $ext_1_ip
+fw_jitsi_dovecot_auth: true
+fw_jitsi_dovecot_host: a.mx.oopen.de