• lib: fix ubsan errors (Patch from Asra Ali) (GH-1468)
• lib: Don't send RST_STREAM to idle stream (GH-1477)
• lib: nghttp2_map backed by nghttp2_ksl
• doc: Update sphinx_rtd_theme
• doc: nghttp2_session_send is also affected by max concurrent streams (Patch from Tomas Krizek) (GH-1489)
• doc: clarify flow control behaviour for nghttp2_session_send() (Patch from Tomas Krizek) (GH-1488)
• build: Add missing cmake/FindSystemd.cmake to dist (GH-1526)
• third-party: Bump llhttp to 2.2.0
• third-party: Bump mruby to 2.1.2
• nghttpx: Deal with the case when h2 backend is retired before it is initialized
• nghttpx: Add accesslog variables to record request path without query (GH-1511)
• nghttpx: Fix stall when TLS follows after proxy protocol
• nghttpx: Fix logging integer