Fix a type mismatch for "arenas.nlruns" mallctl access. This bug caused
a crash during statistics printing on 64-bit systems.
Fix the "stats.active" mallctl to include active memory in huge objects.
Report active bytes for the whole application, as well as per arena.
Remove several unused variables.
Replace chunk stats code that was missing locking; this fixes a race
condition that could corrupt chunk statistics.
Converting malloc_stats_print() to use mallctl*().
Add a missing semicolon in th DSS code.
Convert malloc_tcache_flush() to a mallctl.
Convert malloc_swap_enable() to a set of mallctl's.
Add the 'G'/'g' and 'H'/'h' MALLOC_OPTIONS flags.
Add the malloc_tcache_flush() function.
Disable thread-specific caching until the application goes multi-threaded.
Add the 'M' and 'm' MALLOC_OPTIONS flags, which control the maximum medium size
class.
Relax the cap on small/medium run size to arena_maxclass.
Reduce arena_run_reg_dalloc() integer division code complexity.
Increase the default chunk size from 1MiB to 4MiB.
jemalloc is configured.
Modify arena_malloc() API to avoid unnecessary choose_arena() calls. Remove
unnecessary code from choose_arena().
Enable lazy-lock by default, now that choose_arena() is both faster and out of
the critical path.
Implement objdir support in the build system.
