Get rid of the WT_REF.key.pkey field, it's simpler and more explicit to
cast the key.ikey field to a (uintptr_t).
Merge branch 'develop' into onpage-cell
Convert row-store fast on-page key processing from per-page to per key.
Reference #1030, #1038.
row_key.c:251:15: error: 'p' may be used uninitialized in this function [-Werror=maybe-uninitialized]
row_key.c:252:15: error: 'size' may be used uninitialized in this function [-Werror=maybe-uninitialized]
Instead of using an on-page length of 0 to distinguish between on-page keys
on-page cells, grab a second bit.  I think it's cleaner doing things just in
the one way, rather than having a special bit plus a special length.
It's problematical to use the word "return" in a comment, s_style gets
aggressive.
List the cases in sorted order.
Minor code shuffling to simplify setup.
Merge pull request #1090 from wiredtiger/onpage-cell

Convert fast on-page row-store key access from per-page to per-key.