Implement tsd.

Implement tsd, which is a TLS/TSD abstraction that uses one or both
internally.  Modify bootstrapping such that no tsd's are utilized until
allocation is safe.

Remove malloc_[v]tprintf(), and use malloc_snprintf() instead.

Fix %p argument size handling in malloc_vsnprintf().

Fix a long-standing statistics-related bug in the "thread.arena"
mallctl that could cause crashes due to linked list corruption.

include/jemalloc/internal/chunk.h

@@ -44,7 +44,8 @@ extern size_t		arena_maxclass; /* Max size class for arenas. */
 
 void	*chunk_alloc(size_t size, bool base, bool *zero);
 void	chunk_dealloc(void *chunk, size_t size, bool unmap);
-bool	chunk_boot(void);
+bool	chunk_boot0(void);
+bool	chunk_boot1(void);
 
 #endif /* JEMALLOC_H_EXTERNS */
 /******************************************************************************/