K 10
svn:author
V 3
thj
K 8
svn:date
V 27
2019-04-19T17:06:43.484306Z
K 7
svn:log
V 503
Add stat counter for ipv6 atomic fragments

Add a stat counter to track ipv6 atomic fragments. Atomic fragments can be
generated in response to invalid path MTU values, but are also a potential
attack vector and considered harmful (see RFC6946 and RFC8021).

While here add tracking of the atomic fragment counter to netstat and systat.

Reviewed by:    tuexen, jtl, bz
Approved by:    jtl (mentor), bz (mentor)
Event:  Aberdeen hackathon 2019
Differential Revision:  https://reviews.freebsd.org/D17511

END