* Enhanced string comparison functions and update indtext API usage
- Added library specific case-sensitive and case-insensitive string comparison functions that mimic strcmp.
- Updated indtext_by_string and indtext_by_istring to use the new comparison functions.
- Improved documentation for return values in indtext functions.
- Expanded test data in main.c for comprehensive testing when beginning of string matches another string.
Steve Karg
6993a7c0fd