better string library

File Release Notes and Changelog

Release Name: rc27

Notes:
- Correct const bstring to a different const_bstring declaration.  This can have some backward compatibilty issues:

Some of the callback prototypes have changed, and this will raise warnings in many (in fact most) C compilers, and an error in any C++ compiler used to compile the bstrlib.c module (in C++ mode). The impact is basically that some prototypes need to change, but otherwise all the functionality and usage remains the same.

- Remove a bsafe.c warning
- Add in the functions bassigncstr() and bassignblk()
- Correct binchr() functions (single character detection)
- Remove some warnings via proper casting.
- Improve ::find* performance.
- Add rot13 example.
- Remove non-functional BSTRLIB_BACKDOOR_INCLUDE mechanism.
- Change bdataofse() to be of type (char *)
- Correct trim functions in C++.

Changes:
- Correct const bstring to a different const_bstring declaration.  This can have some backward compatibilty issues:

Some of the callback prototypes have changed, and this will raise warnings in many (in fact most) C compilers, and an error in any C++ compiler used to compile the bstrlib.c module (in C++ mode). The impact is basically that some prototypes need to change, but otherwise all the functionality and usage remains the same.

- Remove a bsafe.c warning
- Add in the functions bassigncstr() and bassignblk()
- Correct binchr() functions (single character detection)
- Remove some warnings via proper casting.
- Improve ::find* performance.
- Add rot13 example.
- Remove non-functional BSTRLIB_BACKDOOR_INCLUDE mechanism.
- Change bdataofse() to be of type (char *)
- Correct trim functions in C++.