Copy stable/9 to releng/9.3 as part of the 9.3-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head to stable/9 as part of 9.0-RELEASE release cycle.

Approved by: re (implicit)

Skip the register based postinc stores here and don't count them
in the number of tests. This way we avoid skipped tests for non-
existent memory access combinations. The number of tests dropped
from 60 to 48.

Add tests for post increment. This bumps the number of tests up to
60. The postinc store tests currently fail (value mismatch). Hence
the score as of this commit is 48 out of 60. Either the kernel or
the tests need to be fixed.

Regression test for unaligned loads and stores for short, int, long,
float, double and long double types. No post-increment tests yet.
All tests are skipped if the debug.unaligned_test sysctl variable
cannot be set to 1.