On this one, my vote would be "no". "Versioned machine names
include the QEMU version number" is pretty well entrenched,
and requiring users to remember that when they want version 4.2
they need to remember some other way of writing it than "4.2"
seems rather unfriendly. And 550 uses of '.' is a lot.
We can't make keyval_parse() accept "/" instead of ".", but can
we make it accept "/" in addition to ".", and then encourage "/" ?
People simply wouldnt be able to use "." as keyval separator if
they're using typenames containing "." (or would have to escape
the typename.