Removed SLICE_ALT in operations.cc up to set_superblock_metainfo.
Removed SLICE_ALT in operations.cc up through get_root.
Removed SLICE_ALT in operations.cc up through check_and_handle_split.
Removed SLICE_ALT in operations.cc up through check_and_handle_underfull.
Removed SLICE_ALT in operations.cc up through get_btree_superblock.
Merge branch 'sam_alt' into sam_alt_nomir
Merge branch 'sam_alt' into sam_alt_nomir
Merge branch 'sam_alt' into sam_alt_nomir
Removed SLICE_ALT in btree.cc up to result_finalizer_visitor_t.
Removed SLICE_ALT in btree.cc up to rdb_update_sindexes.
Removed SLICE_ALT in btree.cc up to post_construct_traversal_helper_t.
Removed SLICE_ALT in rdb_protocol/protocol.cc up to post_construct_and_drain_queue.
Removed SLICE_ALT from rdb store_t constructor.
Removed SLICE_ALT from rdb protocol_read.
Removed SLICE_ALT from protocol_write.
Removed SLICE_ALT in rdb protocol_receive_backfill and such.
Removed SLICE_ALT in rdb protocol_reset_data.
Removed SLICE_ALT from lazy_json.hpp and .cc.
Removed SLICE_ALT from rdb_protocol/btree.hpp.
Removed SLICE_ALT from rdb protocol.hpp.