handy.h, hv.h: fixup hash s suffix macro definitions, move to hv.h

handy.h, hv.h: fixup hash s suffix macro definitions, move to hv.h

For some reason s suffix macro definitions intended for handling
constant string arguments were put into handy.h and not into hv.h.

I think this is wrong, especially as the macro defintions have
"drifted" and are not properly defined in terms the right base
macros.

Also we want to have such wrappers for the main hash functions,
so move them all to hv.h, recode them properly in terms of the
right base macros, and add support for the missing functions.