Revise installation locations for certain BIND binaries

The following discussion from !985 (merged) should be addressed:

@michal started a discussion: (+2 comments)
Here is an exhaustive list of binaries which are currently installed into ${sbindir} that this MR causes to be installed into ${bindir}:
- ddns-confgen
- named-checkconf
- named-checkzone
- named-journalprint
- named-nzd2nzf
- nsec3hash
- rndc-confgen
@ondrej said:

BTW it's wrong to install these to sbin, as they don't require administrator privileges to run.