- MFB:

- MFB:
  - use php's stream in libmagic
  - remove duplicate code (like mime_content_type() compatibility function
    now use the same base as finfo_file())
  - make it portable (works now on windows too, belongs other OSes)

  - don't close caller streams in libmagic (prevent leak and zombie stream)
  - string returned by magic_* are freed on magic_close, duplicate before
    calling magic_close (set return value)
  - if stat failed, don't try to call magic_* (when FILEINFO_MODE_FILE)