doc/general: add missing device support information

doc/general.texi

@@ -928,13 +928,17 @@ performance on systems without hardware floating point support).
 @item Name              @tab Input  @tab Output
 @item ALSA              @tab X      @tab X
 @item BKTR              @tab X      @tab
+@item caca              @tab        @tab X
 @item DV1394            @tab X      @tab
+@item Lavfi virtual device @tab X   @tab
 @item Linux framebuffer @tab X      @tab
 @item JACK              @tab X      @tab
 @item LIBCDIO           @tab X
 @item LIBDC1394         @tab X      @tab
+@item OpenAL            @tab X
 @item OSS               @tab X      @tab X
 @item Pulseaudio        @tab X      @tab
+@item SDL               @tab        @tab X
 @item Video4Linux2      @tab X      @tab
 @item VfW capture       @tab X      @tab
 @item X11 grabbing      @tab X      @tab