adding vpnclient3 for rt-ac68u

[arpydude]

I was using 3vpns of 5 possible vpn-clients on merlin 1 year ago. Performed an in-place upgrade to discover it has been dropped to 2 vpn client configs. I thought it was a poor upgrade so rebuilt. after searching I have found it was lowered with the upgrade and new install (or something I did). Can I bring back just one more vpn client? I was reading it was lowered to save jffs space. I was not running into space problems with nightly reboots. fyi I was also assigning each vpn to it's own ssid with yazfi guest wireless addon alone. (no yazfi-dhcp addon)