I can't figure out how to keep long titles from being truncated in the
plot output, textwrap them in the python script.
Rename the block manager's lock for logging, it doesn't have anything
to do with higher-level checkpoints.
Fix the trylock call, it returns 0 when the mutex is acquired.
Add information about Linux performance tuning to our docs.

Specifically reference transparent huge pages and NUMA zone
reclamation.
Fix compiler warning:

In file included from ../src/include/wt_internal.h:258,
                 from ../src/block/block_addr.c:8:
../src/include/btree.i: In function '__wt_page_modify_init':
../src/include/btree.i:253: warning: implicit conversion shortens 64-bit
value into a 32-bit value
whitespace
rename "type" to clarify the variable's meaning.
Merge branch 'develop' into statistics-split
API change: rework "run-time" and "tree-walk" statistics configuration.
Now, the database is configured for "none", "fast" or "all" statistics,
and each cursor is configured for "fast" or  "all" statistics, with the
additional flag "clear".  A cursor's statistics configuration must match
the database statistics cursor, defaulting to the current configuration.
The statistics_log configuration no longer defaults to "fast", it dumps
whatever the database is configured for.

Rename all of the macros from WT_RUNSTAT_XXX to WT_STAT_FAST_XXX.

Reference #715.