silence a compiler warning due to a stale LIBRESSL_VERSION_NUMBER
ifdef. This fixes the build with the upcoming libcrypto bump.
discussed with and lightly tested with dnsdist by otto (maintainer)
(who needs libh2o-evloop) and myself, testing/hints/ok kn@
H2O is a new generation HTTP server that provides quicker response to
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servers. Designed from ground-up, the server takes full advantage of
HTTP/2 features including prioritized content serving and server push,
promising outstanding experience to the visitors of your web site.