Log Message:
nghttp2 nghttp2-tools: updated to 1.42.0

Nghttp2 v1.42.0

This release includes security advisory.

lib

The UBSAN errors are now fixed.

nghttp2_map is now backed by tree for storing collisions.

doc

Some clarifications are made for nghttp2_session_send function.

build

The missing cmake/FindSystemd.cmake has been added to the tar distribution.