plResetOpts: Reset internal option table info structure

`plResetOpts`: Reset internal option table info structure
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#### `plResetOpts`: Reset internal option table info structure

`plResetOpts (` | `)`;

Resets the internal command line options table to the default built in value. Any user options added with `plMergeOpts` will be cleared. See `plparseopts` for details of how to parse these options in a program.

This function is not used in any of our C examples.

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