Pull up following revision(s) (requested by tls in ticket #1070):
	sys/dev/pci/if_wm.c: revision 1.269
From dyoung@ -- bump max TX DMA size to avoid pathological condition with TSO.
Pull up following revision(s) (requested by cube in ticket #1071):
	sys/net/if_tap.c			1.76

Prevent a race between tap_dev_poll() and tap_start() by making sure the
call to selrecord() happens at splnet().  Fixes kern/47506 and kern/46199.
Ticket 1070 and 1071.