Merge r550,584,587,609,647,674 from libarchive.googlecode.com:

Refactor the read_compression_program to add two new abilities:
 * Public API:  You can now include a signature string when you
   register a program; the program will run only on input that
   matches the signature string.
 * Internal API: You can use the init() function to instantiate
   an external program as part of a filter pipeline.  This
   can be used for graceful fallback (if zlib is unavailable, use
   external gzip instead) and to use external programs with
   bidders that are more sophisticated than a static signature check.

0 files changed, 0 insertions, 0 deletions