docs: SSH Tunnel doc from 1Remote/1Remote#483

Author: VShawn

source/docs/usage/protocol/especial/ssh-tunnel.md

@@ -0,0 +1,15 @@
+You can set up a SSH tunnel by:
+
+1. download and start Kitty portable
+2. enter a hostname and a name in "Saved Sessions/New Folder"
+3. click "Connection" -> "SSH" -> "Tunnels"
+4. enter a source port, for example 777
+5. enter a destination, for example "192.168.1.2:80" - a web interface that is reachable from the host we connect to
+6. click "Add"
+7. go back to "Session" and click "Save (d)"
+
+    Now there is a new file in `..\kitty-portable-win32-0.74.4.13-36\data\config\Sessions\`
+
+8. Open 1Remote and add a SSH server with the hostname and name you entered in step 2, in `KiTTY Session` field, select the file you created in step 7.
+
+Thanks to @BurtGummer from: https://github.com/1Remote/1Remote/issues/483 for providing the solution.

source/mkdocs.yml

@@ -175,6 +175,7 @@ nav:
               - App: usage/protocol/especial/app.md
               - RemoteApp: usage/protocol/especial/remoteapp.md
               - Rdp in mstsc.exe mode: usage/protocol/especial/rdp-in-mstsc-mode.md
+              - SSH Tunnel: usage/protocol/especial/ssh-tunnel.md
           - Runner: usage/protocol/runner.md
       - Team (experimental):
           - Team sharing: usage/team/team-sharing.md