This package is a "local" plugin which allows Moodle to use external
command-line zip and unzip utilities rather than the PHP ZipArchive library.
It's intended as a workaround to ZipArchive's inability to handle large zip
files (see http://tracker.moodle.org/browse/MDL-34388) or if you just think
you'll get better performance from the command-line utilities.

I have only tested this plugin in Ubuntu 12.04. It almost certainly won't work on
Windows, and it might not work on other *nix platforms if their "zip" and "unzip"
utilities have different command-line options and output.


TO INSTALL:

1) Copy the externalzip directory into your ($CFG->dirroot)/local directory

2) Apply the patch file to lib/filestorage/zip_archive.php by cd'ing into
your $CFG->dirroot directory and running this command:

patch -p1 < local/externalzip/lib-filestorage-zip_archive.php.patch

3) Log in to your Moodle and go to the Notifications page to install the
DB changes for the update.

4) After installation navigate to "Site Administration" -> "Plugins" ->
"Local plugins" -> "externalzip" -> "Settings for external zip utility" to
choose between using ZipArchive and the external zip utility.