Add a test that attempts a backup while a bulk load is happening.
Merge branch 'develop' into backup-bulk
Finish writing the test, test both the same and different sessions
so we test both the session and database handle cache behaviors.
Merge branch 'develop' into backup-bulk
Merge branch 'develop' into backup-bulk
Add a GNU libc malloc debugging variable.
Turn off malloc debugging by default.
Separate the tracking we do for the page's block addresses from the
tracking we do for overflow records.
Loosen the conditional to allocate txnid_max array.
A simpler solution: if we free the pages explicitly, we never have to track
any blocks at all.
Merge pull request #652 from wiredtiger/lsm-realloc

Loosen the conditional to allocate txnid_max array.
We're only tracking overflow records: clean up the naming and comments.

One real change.  Simplify the cache-deleted flag handling so either the
trk-onpage flag is set, or the cache-deleted flag is set, but never both.
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
Make it OK if a filesystem doesn't support some posix_fadvise flags.

Specifically flags related to preloading data.
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.