Use `...` instead of POSIX $(...) to pander to stupid shells.

[adns] / regress / case-norm.out

adns debug: using nameserver 172.18.45.6
chiark.greenend.org.uk flags 0 type 1 A(-) submitted
chiark.greenend.org.uk flags 0 type A(-): OK; nrrs=1; cname=$; owner=$; ttl=86400
 195.224.76.132
rc=0