Revert "Ignore country values that are not two characters long"

This reverts commit e4b68b1399ad1e20f84d3c3f44d1128c269fc8ba.
No longer required.

Change-Id: I14fdd42cc98c70f683f851470f50a1cf22d1b470
Remove deprecated format specifiers from the parser

* Remove format specifiers '%l' and '%n', deprecated since aeb6d6bc088,
  and not in use anywhere.
* Rename ncsa_to_epoch to ncsa_to_unix for OCD reasons.

Change-Id: If242ba82068f014e2936c49bcff108de6ec99c10