Report failure if the bucket file grows too large.
Report oversized bucket files as fatal errors during bucket fsck.
Made OBUCK_SHIFT a configurable parameter. Also changed OBUCK_INCOMPLETE_MAGIC,
the original value was an evident typo (fortunately this value should never
appear in valid bucket files, so we are free to change it).
Increased bucket shift in PL customization.
# Support databases >4GB
Set("CONFIG_LARGE_DB");
+# Bucket position alignment shift (maximum bucket file size is 4G << this shift)
+Set("CONFIG_BUCKET_SHIFT" => 7);
+
# Number of sections we remember limits for
Set("SHERLOCK_NUM_SECTIONS" => 4);