uftp4 support (with ipv6 and a new cc algorithm)
uftp4: Finger foo
uftp4: finger foo 2
uftp4: drinking and creating packages dont mix
uftp: Bit the bullet and decided to just update to uftp4

Rather than maintaining a separate package, it just seems
easier to update the package in cero and push to openwrt
when its ready.
Moved it back to uftp
uftp now is threaded