[LARTC] U32 filters in htb.init?

[Gastón]

      I want to use a filter to shape outbound traffic (upload from the
client side) in eth0.

      Manually I should do this by doing something like this:
      tc filter add dev eth0 parent 1:0 protocol ip prio 100 u32 match ip
src 192.168.0.50 classid 1:59

      How can I do this with HTB.init?