Loosen the conditional to allocate txnid_max array.
Merge pull request #652 from wiredtiger/lsm-realloc

Loosen the conditional to allocate txnid_max array.
Merge branch 'develop' into tracking-cleanup
Fix detection of obsolete updates with high concurrency workloads.

Previously, we took the first obsolete update in a list and assumed that any update after that would also be obsolete.  This is reasonable at snapshot isolation, where write-write conflicts are not permitted, so there can only be one uncommitted update on the list at a time.

However, at lower isolation levels, there can be multiple uncommitted updates on a list, and they can commit out of order.  The result was that there can be an uncommitted update after the first obsolete update, and WiredTiger could write to memory after it was freed.

The fix is to only free the contiguous obsolete updates at the end of a list.

closes #639
Fix a bug in in memory page splitting.

We were adding a cell_offset to an entry without a disk image.
Merge branch 'develop' into tracking-cleanup
Add a new skiplist to the WT_PAGE_MODIFY structure and use it to track
overflow record reuse.

Add a new verbose flag "overflow", currently only used by the reuse
overflow list.

Reference #330.
typo
update.
We're doing replacement of quotes with backslash/quote pairs, add in
some more slop when breaking lines in the config files.