DocBook/media: fix some broken links

Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

Documentation/DocBook/v4l/dev-teletext.xml

@@ -10,8 +10,8 @@ connected to the PC parallel port.</para>
 
   <para>The Teletext API was designed by Martin Buck. It is defined in
 the kernel header file <filename>linux/videotext.h</filename>, the
-specification is available from <ulink url="http://home.pages.de/~videotext/">
-http://home.pages.de/~videotext/</ulink>. (Videotext is the name of
+specification is available from <ulink url="ftp://ftp.gwdg.de/pub/linux/misc/videotext/">
+ftp://ftp.gwdg.de/pub/linux/misc/videotext/</ulink>. (Videotext is the name of
 the German public television Teletext service.) Conventional character
 device file names are <filename>/dev/vtx</filename> and
 <filename>/dev/vttuner</filename>, with device number 83, 0 and 83, 16

Documentation/DocBook/v4l/pixfmt.xml

@@ -157,7 +157,7 @@ used in the Windows world.</para>
     <!-- See proposal by Billy Biggs, video4linux-list@redhat.com
 on 11 Oct 2002, subject: "Re: [V4L] Re: v4l2 api", and
 http://vektor.theorem.ca/graphics/ycbcr/ and
-http://www.inforamp.net/~poynton/notes/colour_and_gamma/index.html -->
+http://www.poynton.com/notes/colour_and_gamma/ColorFAQ.html -->
 
     <para>
       <variablelist>