configure: minor improvement to summary output

Remove printing VO modules that were removed earlier, but were enabled
by configure tests that are still needed.

Print "libavcodecs" with the "Codecs: " output.

configure

@@ -2056,7 +2056,7 @@ if test "$_x11" = auto && test "$_x11_headers" = yes ; then
 fi
 if test "$_x11" = yes ; then
   def_x11='#define CONFIG_X11 1'
-  vomodules="x11 xover $vomodules"
+  vomodules="x11 $vomodules"
 else
   _x11=no
   def_x11='#undef CONFIG_X11'
@@ -2297,11 +2297,9 @@ echores "$_jpeg"
 
 if test "$_jpeg" = yes ; then
   def_jpeg='#define CONFIG_JPEG 1'
-  vomodules="jpeg $vomodules"
   extra_ldflags="$extra_ldflags -ljpeg"
 else
   def_jpeg='#undef CONFIG_JPEG'
-  novomodules="jpeg $novomodules"
 fi
 
 
@@ -2338,7 +2336,6 @@ fi
 if test "$_gif" = yes ; then
   def_gif='#define CONFIG_GIF 1'
   codecmodules="gif $codecmodules"
-  vomodules="gif89a $vomodules"
   res_comment="old version, some encoding functions disabled"
   def_gif_4='#undef CONFIG_GIF_4'
   extra_ldflags="$extra_ldflags $_ld_gif"
@@ -2363,7 +2360,6 @@ EOF
 else
   def_gif='#undef CONFIG_GIF'
   def_gif_4='#undef CONFIG_GIF_4'
-  novomodules="gif89a $novomodules"
   nocodecmodules="gif $nocodecmodules"
 fi
 echores "$_gif"
@@ -3645,7 +3641,7 @@ Config files successfully generated by ./configure $configuration !
 
   Enabled optional drivers:
     Input: $inputmodules
-    Codecs: $codecmodules
+    Codecs: libavcodecs $codecmodules
     Audio output: $aomodules
     Video output: $vomodules