src/types.c: Clarify comment for addr_submit (style)

[adns] / regress / case-longdomsrch0.out

adns debug: using nameserver 172.18.45.6
10rndrobwlxxxxxxxxxxlllantysiliogog.llanfairpwllgwyngyllgogerychwyrndrobwlxxxxxxxxxxlllantysiliogog.llanfairpwllgwyngyllgogerychwyrndrobwlxxxxxxxxxxlllantysiliogog.llanfairpwllgwyngyllgogerychwyrndrobwlxxxxxxxxxxlllantysiliogog.relativity.greenend.org.uk flags 1 type 1 A(-) submitted
10rndrobwlxxxxxxxxxxlllantysiliogog.llanfairpwllgwyngyllgogerychwyrndrobwlxxxxxxxxxxlllantysiliogog.llanfairpwllgwyngyllgogerychwyrndrobwlxxxxxxxxxxlllantysiliogog.llanfairpwllgwyngyllgogerychwyrndrobwlxxxxxxxxxxlllantysiliogog.relativity.greenend.org.uk flags 1 type A(-): No such domain; nrrs=0; cname=$; owner=$; ttl=604800
rc=0