Revert "Add ability to set different slot size for wfl"

This functionality isn't required anymore, and it nice to have a static
initializer around, so I'm undoing it.  We can always go back to having it if
we find a use for it again.

This reverts commit 5039067eb0e154afbc8041272996f2661267962f.
Cache align the per vcore data arrays
Code review of mallocs and alignment of pvc stuff

Anything awritten to frequently on a per vcore basis needs to be cache-line
aligned and malloced on a cache-line boundary. This review touched all of the
core data structures which are used frequently.  I need to go back and
rexamine things for dtls, slab allocator, etc.