Bug#789475: udhcpc: valid rfc1123 hostname recognized as "bad"

[Bodo Eggert <7eggert@gmx.de>]

Package: busybox
Version: 1:1.22.0-9+deb8u1
Severity: normal
Tags: d-i

Dear Maintainer,

The valid hostname "52-54-0-12-34-56" is recognized as bad while it should be valid according to rfc1123 (Section 2.1).

-----
Capture of the DHCP reply:
    be1.lrz.bootps > 192.168.7.107.bootpc: BOOTP/DHCP, Reply, length 300, xid 0x4cc35164, Flags [none]
          Client-IP 192.168.7.107
          Your-IP 192.168.7.107
          Client-Ethernet-Address 52:54:00:12:34:56 (oui Unknown)
          file "be1"
          Vendor-rfc1048 Extensions
            Magic Cookie 0x63825363
            DHCP-Message Option 53, length 1: ACK
            Server-ID Option 54, length 4: be1.lrz
            Lease-Time Option 51, length 4: 600
            Subnet-Mask Option 1, length 4: 255.255.255.0
            Default-Gateway Option 3, length 4: be2.lrz
            Domain-Name-Server Option 6, length 4: be1.lrz
            Hostname Option 12, length 16: "52-54-0-12-34-56"
            Domain-Name Option 15, length 3: "lrz"


-- System Information:
Debian Release: 8.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=C, LC_CTYPE=C.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages busybox depends on:
ii  libc6  2.19-18

busybox recommends no packages.

busybox suggests no packages.

-- no debconf information