Copyright (C) 2009-2015 Internet Systems Consortium, Inc. ("ISC")

This Source Code Form is subject to the terms of the Mozilla Public
License, v. 2.0. If a copy of the MPL was not distributed with this
file, You can obtain one at http://mozilla.org/MPL/2.0/.

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The ext/coroutine code is externally maintained and distributed under
the Boost Software License, Version 1.0.  (See its accompanying file
LICENSE_1_0.txt.)