Merge branch 'patch-upstart' of https://github.com/wzyboy/nghttp2 into wzyboy-patch-upstart

contrib/nghttpx-upstart.conf

+# vim: ft=upstart:
+
+description "HTTP/2 reverse proxy"
+
+start on runlevel [2]
+stop on runlevel [016]
+
+exec /usr/bin/nghttpx