typo, get rid of "leaf leaf" in error message.
Rework 5169532; it's not enough to select a page size that's large
enough that we won't have to split, we also have to turn off split
processing.  Shuffle some code: if __rec_split_init() has to know
about salvage anyway, might as well put all the magic there.
Minor wording changes to clarify the LevelDB configuration options.