libupnp: update from 1.6.6 to 1.6.19, potentially fixes CVE-2012-5958, CVE-2012-5959, CVE-2012-5960
libupnp: update from 1.6.6 to 1.6.19, potentially fixes CVE-2012-5958, CVE-2012-5959, CVE-2012-5960

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