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See companion patch: Subject: [PATCH nbdkit] server: Move size parsing code (nbdkit_parse_size) to common/include This is the second part of the patch. It adds the new human_size_parse function to libnbd and then uses it for parsing --queue-size, --request-size and --sparse. The main complication here is that there was already a common/utils/human-size.h header which ends up (eventually)