IPv6 fragments in 10.2

[Melissa Pilgrim]

Now that pf in 10.2 supports IPv6 fragments, how do you configure pf to 
allow them?  I'm still seeing UDP PMTU breakage specifically with 
FreeBSD and pf related to the packet filter not passing fragments.  The 
basic "fragment reassemble" scrub rule doesn't seem to be sufficient. 
The man page was not updated with the commit, and I'm not having any 
luck with web searches.