[gentoo-user] CLVM and CMAN use flags dropped?

Howdy folks,
around november 2018 the use flags clvm and cman seem to have been 
dropped for LVM2
the old ebuild has the lines
   if use clvm; then
   ...
   myconf="${myconf} --with-clvmd=${clvmd}"

but the new ebuild just has the line
   myconf="${myconf} --with-clvmd=none --with-cluster=none"

I've been doing some digging to try to find out if i just missed the 
memo but this seems to have been silently dropped
i was wondering if anyone knew the hows or whys? a link to the notice is 
fine I wanted to read it before i hack the ebuild
thanks in advance!