Latest version of sfqcodel from CableLabs (http://pollere.net/Txtdocs/sfqcodel.h)
Comment out #include to compile correctly.
Simplify further: replace CellLink with LinkDelay, which is more standard.
Get rid of longest_queue; we don't use drop from front of longest queue anymore.
Get rid of CellLink, LinkDelay works for us and is more standard anyway.
Considerably simplify sfd. Still need to fix a TODO, but compiles.
Get rid of CellLink defaults
Implement empty() to use SFD with new system.
Add user_id to command instead of using bind(); check for divide by zero.
Add a method that returns number of users