MFC r251318:
Remove irrelevant comments.


git-svn-id: svn://svn.freebsd.org/base/stable/9@251450 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
MFH (r247863): fix occasional SIGSEGV when an interface was added.


git-svn-id: svn://svn.freebsd.org/base/stable/9@251469 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f
Merge remote-tracking branch 'upstream/svn_stable_9' into svn_stable_9