evp_generic_fetch_by_number() does the same thing as evp_generic_fetch(),
but takes a I<name_id> instead of a number.
-I<name_id> must always be non-zero; as a matter of fact, it being zero
+I<name_id> must always be nonzero; as a matter of fact, it being zero
is considered a programming error.
This is meant to be used when one method needs to fetch an associated
other method, and is typically called from inside the given function