libupnp: reverted to v1.6.6 due to api changes.
libupnp: reverted to v1.6.6 due to api changes.

api changes in 1.6.8 are incompatible with those projects
based off earlier versions, such as uShare.

Have reverted to 1.6.6 and fixed the download url.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

I had bumped the version in the first place because I thought the download
was gone, but they had just changed the casing in the URL. Reverting
to this version until someone who uses this software says it is OK
to bump back up.

 - adamv

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