Licensing issue: Replace non-DFSG pictures by DFSG compliant ones

[tenzap]

What is the issue with the HTML Standard?

Some files have a non-DFSG compliant license, namely:

• images/abstract.jpeg → CC-BY-2.0 © Wonderlane

• images/abstract.png → CC-BY-2.0 © Wonderlane
  The image in the introduction is based on a photo by Wonderlane.
  (CC BY 2.0)

• images/robots.jpeg → CC-BY-2.0 © JohnColburn
  The photograph of robot 148 climbing the tower at the FIRST Robotics
  Competition 2013 Silicon Valley Regional is based on a work by Lenore Edman.
  (CC BY 2.0)

Reference: https://wiki.debian.org/DFSGLicenses#cc-by-2.0

Please replace them by DFSG compatible alternatives so that we don't have to remove them from the Debian package of the html5 spec. BTW, we don't link to the resources on your website as that would be a privacy breach.

N:
W: privacy-breach-generic
N: 
N:   This package creates a potential privacy breach by fetching data from an external website at runtime. Please remove these scripts or
N:   external HTML resources.
N:   
N:   Please replace any scripts, images, or other remote resources with non-remote resources. It is preferable to replace them with text and
N:   links but local copies of the remote resources are also acceptable as long as they don't also make calls to remote services. Please ensure
N:   that the remote resources are suitable for Debian main before making local copies of them.
N: 
N:   Visibility: warning
N:   Show-Always: no
N:   Check: files/privacy-breach
N: 

[annevk]

I understand that this is an issue for Debian, but calling this a "licensing issue" in the context of the HTML standard seems like a stretch.

I think we'd probably accept replacements, although the kitchen sink Abstract might be tricky as it's somewhat iconic.