README: fix URL to IP-stack uIP 0.9 88/head
authorBastian Bittorf <bittorf@bluebottle.com>
Fri, 8 Jan 2016 08:11:25 +0000 (09:11 +0100)
committerBastian Bittorf <bittorf@bluebottle.com>
Fri, 8 Jan 2016 08:11:25 +0000 (09:11 +0100)
commit1405fc05ee8de9d2f014c198eedcdab01f92087c
tree1f11beb40220344505acc5bb97ce844598b3b2c8
parenta404a56e48c2796e4621b42cd461bf5e95ea5e09
README: fix URL to IP-stack uIP 0.9

The old link does not work anymore, so use the official source.
README.md