bin/47841: pkg_add(1) http://ftp.jp.netbsd.org/ fails with weird error

[Izumi Tsutsui <tsutsui%ceres.dti.ne.jp@localhost>]

>Number:         47841
>Category:       bin
>Synopsis:       pkg_add(1) http://ftp.jp.netbsd.org/ fails with weird error
>Confidential:   no
>Severity:       non-critical
>Priority:       medium
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Mon May 20 11:15:01 +0000 2013
>Originator:     Izumi Tsutsui
>Release:        NetBSD 6.1
>Organization:
>Environment:
System: NetBSD/i386 6.1
Architecture: i386 and m68k
Machine: i386 and x68k, maybe MI issue
>Description:
pkg_add(1) using binary packages mirrored in http://ftp.jp.netbsd.org/
fails with "Host not found" error unless whole *.tgz filename is specified,
while pkg_add via ftp:// against the same path works. 

Probably there is some http server dependent problem, but
the error message "Host not found" by pkg_add(1) is not correct
and it confuses users.

>How-To-Repeat:

# uname -mrs
NetBSD 6.1 i386
# pkg_add 
http://ftp.jp.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/6.0/All/digest
pkg_add: Can't process 
http://ftp.jp.netbsd.org:80/pub/pkgsrc/packages/NetBSD/i386/6.0/All/digest*: 
Host not found
pkg_add: no pkg found for 
'http://ftp.jp.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/6.0/All/digest', 
sorry.
pkg_add: 1 package addition failed
# pkg_add ftp://ftp.jp.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/6.0/All/digest
pkg_add: Warning: package `digest-20121220' was built for a platform:
pkg_add: NetBSD/i386 6.0 (pkg) vs. NetBSD/i386 6.1 (this host)
# pkg_delete digest
# pkg_add 
http://ftp.jp.netbsd.org/pub/pkgsrc/packages/NetBSD/i386/6.0/All/digest-20121220.tgz
pkg_add: Warning: package `digest-20121220' was built for a platform:
pkg_add: NetBSD/i386 6.0 (pkg) vs. NetBSD/i386 6.1 (this host)
# 

>Fix:
No idea.