- add translators from errno and GetLastError to LibError
- clarified return values of callbacks (they must return
INFO_CB_CONTINUE to continue)
- this exposed a few bugs in error handling chains (returning incorrect
values); also reduced say-nothing instances of return -1.
- move CHECK_ERR etc. macros to lib_error
This was SVN commit r3229.
2) VFS: add path_copy convenience routine
3) various lib code: removed unnecessary const cluttering things (like
const char* _const_ name in param list)
This was SVN commit r1483.
