Merge pull request scrapinghub#975 from Gallaecio/changes-3.4.1

Update CHANGES.rst for Splash 3.4.1
wangjun · Dec 9, 2019 · a0d6d78 · a0d6d78
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diff --git a/CHANGES.rst b/CHANGES.rst
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 Changes
 =======
 
+3.4.1 (2019-12-??)
+------------------
+
+HTTP2 support is now disabled by default when using the default Splash engine,
+WebKit. We discovered that it does not work properly on some websites, which
+results in ``network399`` errors or incorrect rendering (if those
+``network399`` errors happen for HTML resources such as style of script files).
+
+It can be enabled with the :ref:`http2 <arg-http2>` argument, and with
+:ref:`request:set_http2_enabled <splash-request-set-http2-enabled>` or
+:ref:`splash-http2-enabled` in Lua scripts.
+
+
 3.4 (2019-10-25)
 ----------------