How to make use of the protected payloads

[Justus Winter]

Hello :)

here is a patch that demonstrates how the new protected payloads can
be used to optimize the receiver lookup in Hurd servers.  It patches
mach-defpager, which is very self-contained due to its heritage, most
importantly it does not use libports.  This made it an excellent
target to convert first.  In fact, I've been using this patch in all
my Hurd packages for the last seven months.

Cheers,
Justus