dns/inadyn: Update to 2.6

Note that the UIDs/GIDs were meaning to add 455 as the ID,
but typed 445 in the patch. I've corrected the IDs to 455.

I've also elided one blank line between the _DEPENDS lines
to please portlint.

Other than that, test builds succeeded on 11.3 (i386, amd64),
12.1 (i386, amd64, mips64, aarch64).

PR: 241426
Submitted by: Colin T. <bugzilla@nulldir.e4ward.com>
Reviewed by: Daniel Engberg
Approved by: samm@ (maintainer timeout, >4 months)