If you edit a zip file with Windows Explorer, it will rewrite the entire
central directory, setting all files version_needed field to 2.0/MS-DOS,
but it won't touch files that it doesn't plan to alter, so you might end
up with a local header that doesn't match the central directory details.
We aren't currently using the version_needed information, so now we just
favor the local header's copy of it in case we ever need it, and don't
complain if the central directory doesn't match.
Fixes#24.
So if a zip file goes to the zip archiver but is corrupted, the system can now
know not to bother trying other archivers once the zip archiver has had a shot
at it, and just as important: it can report the real error from that archiver
instead of a generic "unsupported."
Now callbacks can stop further enumeration and report errors, if they had a
catastrophic issue or just found what they needed and don't need to process
any more items.
Also, the actual enumerators can report errors instead of silently dropping
items. This led to several other fixes as all these implementations got
audited and reworked.
The original, non-callback enumerator now returns NULL if it can't produce a
complete list instead of dropping items and returning a partial list.
So now you can drop this into your program and not worry about filename
conflicts, or where "platform_unix.c" came from in the debugger, etc.
Also renamed the "beos" sources to "haiku" and "macosx" to "macos" to match
modern platform names.
Ozkan Sezer
Ryan C. Gordon