Add host variable files for various hosts and update DNS configurations

- Created `wiki-common.yml` for wiki.cadus.org with DNS settings and git repository configurations.
- Added `www-common.yml` for www.oopen.de including SFTP group creation and root user password.
- Introduced `zapata-alt-common.yml` for zapata-alt.opp.netz with network interface configurations, Samba user reorganize 'host_vars'

host_vars/cl-02.oopen.de/cl-02-ipt-server.yml

@@ -0,0 +1,27 @@
+---
+# ipt-firewall configuration for cl-02.oopen.de
+# Generated by extract-fw-host-vars.py - review before committing!
+# Place in: host_vars/<hostname>/ipt_firewall.yml
+
+fw_manage_config: true
+
+# --- Network
+fw_ext_interfaces:
+  - "eth0"
+fw_ext_ips_v4:
+  - "95.217.204.203"
+fw_ext_ips_v6:
+  - "2a01:4f9:4a:47e5::203"
+
+# --- 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
+
+# --- Block
+fw_blocked_ips: 222.184.0.0/13 61.160.0.0/16 116.8.0.0/14