tests/netgraph: Tests for ng_bridge
Test functionality of ng_bridge(4):
- replicating traffic to anything but the sending hook
- persistence
- detect loops
- unicast to only one link of many
- stretch to implementation limits on broadcast
Reviewed by: kp
Differential Revision: https://reviews.freebsd.org/D30647
Differential Revision: https://reviews.freebsd.org/D30699
(cherry picked from commit 61814702398ce29430b2bef75cbdd6fd2c07ad12)
(cherry picked from commit 5554abd9cc9702af30af90925b33c5efff4e7d88)