Ready for commit? Switch PF to use kmalloc instead of zalloc

[Jan Lentfer]

After my little baby break I took on my pf work again. I finalized the 
patch to convert from zalloc to kmalloc. It works fine now on kldload 
and kldunload, no more kmalloc_uninit warnings. Also basic testing 
didn't reveal any problems.

Here is the patch:
http://gitweb.dragonflybsd.org/~lentferj/dragonfly.git/commitdiff/455edff3c06ceb485b321add71d04fc593514079
Comments please

Jan

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