evdns: name_parse(): fix remote stack overread#784
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Description
This PR added a bounds check before memcpy operation in name_parse() function to prevent potential out-of-bounds reads. This potential vulnerability was cloned from libevent and was fixed in libevent/libevent@96f64a0.
Reference:
libevent/libevent@96f64a0
CVE-2016-10195