Bug#787178: wdg-html-validator: Remove w3c-dtd-xhtml reference from d/control

[Mathieu Malaterre <malat@debian.org>]

Source: wdg-html-validator
Severity: serious
Justification: rely on obsolete package
Control: blocks 711332 with -1

Please remove reference to w3c-dtd-xhtml from debian/control. This
package will be removed for stretch (see #711332), it has been
superseded by w3c-sgml-lib.


-- System Information:
Debian Release: 8.0
  APT prefers stable
  APT policy: (700, 'stable'), (100, 'unstable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 3.16.0-4-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.utf8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)