Finish OpenVPN wiki migration from GitHub Wiki to Pi-hole docs

Signed-off-by: DL6ER <dl6er@dl6er.de>

mkdocs.yml

@@ -58,9 +58,12 @@ pages:
     - 'Installation': 'guides/vpn/installation.md'
     - 'Setup OpenVPN Server': 'guides/vpn/setup-openvpn-server.md'
     - 'Firewall Configuration': 'guides/vpn/firewall.md'
-    - 'Connecting clients': 'guides/vpn/clients.md'
+    - 'Connecting clients': 
+      - 'General': 'guides/vpn/clients.md'
+      - 'Android': 'guides/vpn/android-client.md'
     - 'Optional: Only route DNS via VPN': 'guides/vpn/only-dns-via-vpn.md'
     - 'Optional: Dual operation: LAN & VPN at the same time': 'guides/vpn/dual-operation.md'
+    - 'Optional: Dynamic DNS': 'guides/vpn/dynDNS.md'
 extra:
   social:
     - type: globe