fieldsplit bug fixes:
fieldsplit bug fixes:

* Do not invoke the regular expression code if -x is not specified.
* Include the binary name in the error message when required args are not present.
* Clean up some x{re,m}alloc() size args.

google/crush-tools,lexsf/crush-tools,lexsf/crush-tools,lexsf/crush-tools,lexsf/crush-tools,lexsf/crush-tools,google/crush-tools,google/crush-tools,google/crush-tools,google/crush-tools,google/crush-tools,lexsf/crush-tools,google/crush-tools,lexsf/crush-tools