optionOnlyUsage - Print usage text for just the options

       This routine will print only the usage for each option.  This function may be used when the emitted usage
       must incorporate information not available to AutoOpts.

       pOpts  program options descriptor

       ex_code
              exit code for calling exit(3)

       optionOnlyUsage - Print usage text for just the options

       The info documentation for the -lopts library.
       ao_string_tokenize(3),  configFileLoad(3), optionFileLoad(3), optionFindNextValue(3), optionFindValue(3),
       optionFree(3),    optionGetValue(3),    optionLoadLine(3),    optionMemberList(3),    optionNextValue(3),
       optionPrintVersion(3),      optionPrintVersionAndReturn(3),      optionProcess(3),      optionRestore(3),
       optionSaveFile(3),    optionSaveState(3),    optionUnloadNested(3),    optionVersion(3),    strequate(3),
       streqvcmp(3), streqvmap(3), strneqvcmp(3), strtransform(3),

                                                   2018-08-26                                 optionOnlyUsage(3)

       #include <your-opts.h>
       cc [...] -o outfile infile.c -lopts [...]

       void optionOnlyUsage(tOptions * pOpts, int ex_code);