Fix about half of the unescaped quotes in llhb042.
Handle unescaped quotes once and for all. (Reverts all corrections to data.)
Reapply 99bf1a5c03: Salvage as much as we can from a truncated metadata file (llsb004).
Reapply 091076e867: Fix upstream CSV creation error in llsb032 that resulted in misplaced values.
Reapply 4871a053cd: Fix mistranscribed dates (month > 12).