Added and used page_cache_index_write_sink_t, added new_mutex_t, did not push through to index_write.
Removed some irksome spacing around our precious reference ampersands.
Added reset methods to rwlock_in_line_t and new_mutex_in_line_t.
Passed in and IGNORED and passed dummy values for new_mutex_in_line_t parameter of index_write, now there are RSIs to fix.
Replaced NULL index_write parameter with a dummy_acq in data block manager.
Replaced NULL index_write parameter with a dummy_acq in prep_serializer.
Made the merger serializer use a dummy acq temporarily instead of a NULL.
Used the new_mutex_in_line_t in log_serializer_t::index_write.
Fixed const reference usage, brace usage.
Merge branch 'next' into sam_multiple_index_writes
Made merger_serializer_t use the new_mutex_in_line_t parameter, possibly making simultaneous index writes be implemented.
Removed a resolved LSI comment.
Improved outstanding_txns message with a count.
Removed debug.hpp inclusion.
Added some comments about new_mutex_t and mutex_t.
Merge branch 'next' into sam_multiple_index_writes
Made outstanding_txn be an intptr_t.
Fixed a compilation error for our precious intptr_t format string.
Made us actually wait for exclusive access to the mutex acqs we are using with index_write.
Merge branch 'sam_multiple_index_writes' into sam_multiple_ii