Update

More bug hunting and fixing:

• ssb-db2#360
• ssb-db2#361
• ssb-db2#362

One thing I discovered was that it seems we are doing redundant scanning of the log when building jitdb indexes, which surfaced when I paid attention to post-compaction reindexing. I'm now working on refactoring jitdb internals so that it does less scanning in vain. One can hope that this will improve performance!