enable null pointer hardening by default

[Eric Paris]

On Thu, 2007-12-13 at 11:28 -0500, Kyle McMartin wrote:
> Hi Eric,
> 
> On Thu, Dec 13, 2007 at 10:58:38AM -0500, Eric Paris wrote:
> > Would anyone have a problem carrying this patch in fedora?  This would
> > be a forever fedora'ism.
> > 
> 
> Wouldn't it be better to just use sysctl in an init script to turn it on
> during boot (or, optionally, not.) as opposed to carrying a patch
> perpetually?

I actually talked to the sysctl.conf owner first who said "if it is a
good default for everyone turn it on in the kernel"

which i tended to agree with.  But I like Eric's way of enabling it
better, especially since now every distro will have to choose to
enable/disable rather than just having it ignorable.

-Eric