plMergeOpts: Merge use option table into internal info structure

`plMergeOpts`: Merge use option table into internal info structure
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#### `plMergeOpts`: Merge use option table into internal info structure

`PLINT plMergeOpts (` | options,
| name,
| notes`)`;

Merges in a set of user-supplied command line options with the internal options table. This allows such options to be used along with the built-in PLplot options to set device driver, output file etc. See `plparseopts` for details of how to parse these options in a program.

`options` (`PLOptionTable *`, input)

  User option table to merge.

`name` (``PLCHAR_VECTOR``, input)

  Label to preface the options in the program help.

`notes` (``PLCHAR_VECTOR` *`, input)

  A vector of character strings which appear after the options in the program help.

This function is used in C examples 1, 8, 16, 20 and 21.

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