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329631dee9
Most Microsoft updates now contain an SHA1 hash in the filename. Since these files are uniquely identifiable, use mirror mode (which creates a hash of just the filename instead of the entire URL) to cache them. (But first check the URL cache to see if it has been downloaded as a URL already.) This is a HUGELY needed fix. Windows 10 updates are 5+ GB per month, and we lose several days of bandwidth downloading duplicates from different mirrors. Sometimes a single client will request the same patch from multiple mirrors. That's bad. This patch will save a ton of bandwidth, and lots of disk space. The patch limits the SHA1 test to microsoft only, but it could be easily expanded to other vendors if there is a need. Signed-off-by: Justin Luth <jluth@mail.com> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>