Trouble with natd and path mtu discovery (ICMP_UNREACH_NEEDFRAG)

[Rolf Grossmann]

Hi again,

sorry, I keep forgetting to say, this is 4.8-STABLE.

And I also wanted to say, backing out the patch from alias.c rev. 1.23
solves my problem, but as a result I may get the problem described in
the PR.

Rolf