improve readability of radix code

- use RADIX_V4 and RADIX_V6 instead of 0 and 1 as array indices
- remove some unused macros
11 jobs for 293-cleanup-radix in 10 minutes and 48 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Precheck
passed precheck:debian:sid:amd64 #14808
amd64 docker linux

00:00:14

 
  Build
passed build:clang:debian:sid:amd64 #14809
amd64 docker linux

00:02:41

passed build:clang:debian:sid:i386 #14811
i386 docker linux

00:03:29

passed build:debian:sid:amd64 #14810
amd64 docker linux

00:02:36

passed build:debian:sid:i386 #14812
i386 docker linux

00:02:46

 
  Test
passed systemtest:debian:sid:amd64 #14816
amd64 docker linux

00:05:07

passed systemtest:debian:sid:i386 #14817
i386 docker linux

00:05:26

passed unittest:clang:debian:sid:amd64 #14818
linux docker amd64

00:01:37

passed unittest:debian:sid:amd64 #14813
amd64 docker linux

00:04:01

passed unittest:debian:sid:i386 #14815
i386 docker linux

00:04:06

failed unittest:clang:debian:sid:amd64 #14814
amd64 docker linux

00:04:21