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/web.so36.net/web-ipt-server.yml

@@ -0,0 +1,44 @@
+---
+# ipt-firewall configuration for web.so36.net
+# 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:
+  - "192.68.11.74"
+fw_ext_ips_v6:
+  - "2001:678:a40:3000::74"
+
+# --- Munin
+munin_remote_ipv4: 192.68.11.73
+munin_remote_ipv6: "2001:678:a40:3000::73"
+fw_munin_server_ips_v6: "2001:678:a40:3000::73"
+
+# --- Access control IPv4
+fw_allow_ext_service_v4: "192.68.11.72:3306:tcp 192.68.11.77:1036:tcp 192.68.11.79:1036:tcp 138.201.23.195:1036:tcp"
+
+# --- Access control IPv6
+fw_allow_ext_service_v6: "2001:678:a40:3000::72,3306,tcp 2001:678:a40:3000::77,1036,tcp 2001:678:a40:3000::79,1036,tcp 2a01:4f8:171:2895::195,1036,tcp"
+
+# --- SSH
+fw_ssh_ports: 1036 22
+
+# --- HTTP
+fw_http_server_ips: $ext_ips
+
+# --- Mail
+fw_mail_client_ips: $ext_ips
+fw_dovecot_auth_port: 44444
+
+# --- FTP
+fw_ftp_server_ips: $ext_1_ip
+
+# --- Out ports
+fw_tcp_out_ports: 1036
+
+# --- Block
+fw_blocked_ips_v4: 222.184.0.0/13 61.160.0.0/16 116.8.0.0/14