msi: Download the MSI package if it is a remote URL [try3]

[James Hawkins]

Hi,

This version uses the URL cache to manage the downloaded packages.  If
we've already downloaded the package, we'll use the cached version
instead of downloading it again.  This fixes bug 3592.
http://bugs.winehq.org/show_bug.cgi?id=5392

Changelog:
* Download the MSI package if it is a remote URL.

 dlls/msi/Makefile.in |    2 +-
 dlls/msi/package.c   |   36 +++++++++++++++++++++++++++++++++++-
 2 files changed, 36 insertions(+), 2 deletions(-)

--
James Hawkins
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