Pull up following revision(s) (requested by ozaki-r in ticket #431):
sys/net/if_pppoe.c: revision 1.133
Remove wrong assertions
rw_lock_held() returns true when any context holds the lock. However, in
if_pppoe.c, the function was used wrongly as it returns true only if the lock is
held in the same context.
From s-yamaguchi@IIJ

(msaitoh)