Made outstanding_txn be an intptr_t.
Fixed a compilation error for our precious intptr_t format string.
Merge branch 'sam_multiple_index_writes' into sam_multiple_ii
Made linux_file_t assert thread in set_size and set_size_at_least.
Merge branch 'next' into sam_multiple_ii
Renamed file get_size, set_size, ... to get_file_size, set_file_size, ...
Merge branch 'next' into sam_multiple_ii
Made linux_file_t destruction possibly block, added drainer for set_file_size ops.
Merge branch 'sam_multiple_index_writes' into sam_multiple_ii
Removed the "Is this still true?" comments.
Made chunk size a bit adaptable to chunk_factor.