doc: drop "./" binary prefixes.

doc/ffserver.texi

@@ -110,8 +110,8 @@ As a simple test, just run the following two command lines where INPUTFILE
 is some file which you can decode with ffmpeg:
 
 @example
-./ffserver -f doc/ffserver.conf &
-./ffmpeg -i INPUTFILE http://localhost:8090/feed1.ffm
+ffserver -f doc/ffserver.conf &
+ffmpeg -i INPUTFILE http://localhost:8090/feed1.ffm
 @end example
 
 At this point you should be able to go to your Windows machine and fire up

doc/filters.texi

@@ -1219,7 +1219,7 @@ which is bottom field first.
 
 For example:
 @example
-./ffmpeg -i in.vob -vf "fieldorder=bff" out.dv
+ffmpeg -i in.vob -vf "fieldorder=bff" out.dv
 @end example
 
 @section fifo
@@ -2295,7 +2295,7 @@ Pass the images of input video on to next video filter as multiple
 slices.
 
 @example
-./ffmpeg -i in.avi -vf "slicify=32" out.avi
+ffmpeg -i in.avi -vf "slicify=32" out.avi
 @end example
 
 The filter accepts the slice height as parameter. If the parameter is
@@ -2407,7 +2407,7 @@ unsharp=7:7:2.5
 unsharp=7:7:-2:7:7:-2
 
 # Use the default values with @command{ffmpeg}
-./ffmpeg -i in.avi -vf "unsharp" out.mp4
+ffmpeg -i in.avi -vf "unsharp" out.mp4
 @end example
 
 @section vflip
@@ -2415,7 +2415,7 @@ unsharp=7:7:-2:7:7:-2
 Flip the input video vertically.
 
 @example
-./ffmpeg -i in.avi -vf "vflip" out.avi
+ffmpeg -i in.avi -vf "vflip" out.avi
 @end example
 
 @section yadif

doc/libavfilter.texi

@@ -36,7 +36,7 @@ and the vflip filter before merging it back with the other stream by
 overlaying it on top. You can use the following command to achieve this:
 
 @example
-./ffmpeg -i input -vf "[in] split [T1], fifo, [T2] overlay=0:H/2 [out]; [T1] fifo, crop=iw:ih/2:0:ih/2, vflip [T2]" output
+ffmpeg -i input -vf "[in] split [T1], fifo, [T2] overlay=0:H/2 [out]; [T1] fifo, crop=iw:ih/2:0:ih/2, vflip [T2]" output
 @end example
 
 The result will be that in output the top half of the video is mirrored