MFC r339930:

MFC r339930:

   With more excessive use of modules, more kernel parts working with
   VIMAGE, and feature richness and global state increasing the 8k of
   vnet module space are no longer sufficient for people and loading
   multiple modules, e.g., pf(4) and ipl(4) or ipsec(4) will fail on
   the second module.

   Increase the module space to 8 * PAGE_SIZE which should be enough
   to hold multiple firewalls, ipsec, multicast (as in the old days was
   a problem), epair, carp, and any kind of other vnet enabled modules.

   Sadly this is a global byte array part of the vnet_set, so we cannot
   dynamically change its size;  otherwise a TUNABLE would have been
   a better solution.

PR:			228854
   Reported by:	Ernie Luzar, Marek Zarychta

Approved by:	re (kib)