Inner tunnel external proxy fails under stress due to zero vectors

[Alan DeKok]

Brian Julin wrote:
> After a long dig through the debugs, finally I noticed from
> a packet dump that packets with 0x00 vectors were hitting
> the wire, and when IDs were recycled that of course results
> in false "duplicates" (as well as the other crypto-related
> issues with that.)

  Oops.

> ...however this seems to be just what is happening.  In fact, if
> above that I change:
...
> ...then the setup passes stress testing just fine.
> 
> Trouble is I'm not sure if there are ramifications to doing that...

  Pretty much nothing.  The only code which uses the vector is the code
which sends/receives packets.

  I'll commit a fix.

  Alan DeKok.