Paul Eggert 738ad89a82 * zic.c: Output version-2 format files if possible. ...

We don't know of any clients where this makes a difference, but it
is a more-conservative change, as in theory older clients could
reject version-3 format files merely because of the version number.
(ZIC_VERSION_PRE_2013): New macro.
(writezone): New arg 'version'.  All callers changed.
(outzone): Output version-2 format files unless the capabilities
of version 3 are used.

2013-09-15 23:22:33 -05:00

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