New build requirements for 1.10?

Starting to put together updated binaries for 1.10 release. Can someone
summarize any new build requirements, particularly for Windows?

I see the reference to LZ4. Should we use the "internal" implementation or
are we expected to build and deliver a liblz4 for Windows?

Anything else? I recall reading something about utf8proc but not sure what
that is or what it is used for. FWIW, our 1.9 build process works for 1.10
but obviously if there are new, but optional, features or libraries added
then we probably are not building them yet.

-- 
Thanks
Mark Phippard
http://markphip.blogspot.com/