Store server tunnel keys / read tunnel keys from a specified directory when creating a tunnel with tunnelcontrol

Use .i2p-zero in the user's home directory as the i2p config dir.

resources/tunnel-control.sh

@@ -1,3 +1,3 @@
 #!/bin/bash
 
-exec 3<>/dev/tcp/localhost/30000; echo "$1 $2 $3" >&3; cat <&3
+exec 3<>/dev/tcp/localhost/30000; echo "$1 $2 $3 $4" >&3; cat <&3