pkg/55959: devel/unidiff MASTER_SITES are unavailable

[kim%netbsd.org@localhost (Kimmo Suominen)]

>Number:         55959
>Category:       pkg
>Synopsis:       devel/unidiff MASTER_SITES are unavailable
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    pkg-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 27 09:20:00 +0000 2021
>Originator:     Kimmo Suominen
>Release:        NetBSD 9.99.77
>Organization:
>Environment:
System: NetBSD rendez-vous.gw.fi 9.99.77 NetBSD 9.99.77 (GENERIC) #0: Thu Dec 24 22:36:43 UTC 2020 mkrepro%mkrepro.NetBSD.org@localhost:/usr/src/sys/arch/amd64/compile/GENERIC amd64
Architecture: x86_64
Machine: amd64
>Description:

	The only site in MASTER_SITES for devel/unidiff no longer
	exists, because www.landfield.com does not resolve.

	The registered name servers for landfield.com do not exist:
	- ns.landfield.com [67.66.8.212] does not respond (by IP)
	- rkive.landfield.com [67.66.8.209] does not respond (by IP)
	- ns-ext.vix.com [204.152.184.64] refuses to answer (by IP)
	  * ns-ext.vix.com does not exist
	  * the IP address maps to ns-ext.isc.org

>How-To-Repeat:
>Fix: