2640cea175
The constexpr_hash.h header has fallen out of use. As constexpr hashing will be used for IDs with the service locator protocol, update these hashes to be 32 and 64 bit FNV-1a, and replace the _h user-defined literal with _id (a 64-bit hash), and _id8 (a 32-bit hash folded down to 8 bits). These are now in the util/hash.h header along with the runtime hash functions.