Hi,

Here is a patch to have a SVG version of the Gnus mode-line logo.  I
have used "etc/images/gnus/gnus.svg" as a base, removed the shadow and
just kept the head of the Gnu.

I have chosen to remove the stroke color so the foreground color of the
default face will be used to draw the icon.  I think it is better to
match any themes.

I have kept all the copyright information from gnus.svg but I think it
could also be minified a bit by stripping it.  WDYT?

Best regards,