. No need for the timer_running member on llc_timer,
  we only need it in one place, and timer_pending is
  equivalent. One more procom OS generalisation killed.
. Move the skb->protocol assignment in llc_build_and_send_pkt
  routines and llc_ui_send_data to the caller, this is the common
  practice in Linux networking code (think netif_rx) and required
  to keep the request functions in psnap and p8022 simple.
. Remove the rpt_status (report status) ev members, not
  used at all, not even in the original procom code.
. Convert psnap and p8022 request functions to use
  llc_ui_build_and_send_ui_pkt, removing all the prim cruft.