[FFmpeg-devel] [PATCH]Fix configure --help output

[Carl Eugen Hoyos]

Hi!

Some options listed in ./configure --help have no effect, attached patch 
should improve output.

Please comment, Carl Eugen
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diff --git a/configure b/configure
index 5a5cbc2..d9a192b 100755
--- a/configure
+++ b/configure
@@ -141,10 +141,10 @@ Component options:
   --disable-fft            disable FFT code
 
 Hardware accelerators:
-  --enable-dxva2           enable DXVA2 code
+  --disable-dxva2          disable DXVA2 code [autodetect]
   --enable-vaapi           enable VAAPI code
   --enable-vda             enable VDA code
-  --enable-vdpau           enable VDPAU code
+  --disable-vdpau          disable VDPAU code [autodetect]
 
 Individual component options:
   --disable-everything     disable all components listed below
@@ -185,11 +185,11 @@ Individual component options:
 
 External library support:
   --enable-avisynth        enable reading of AVISynth script files [no]
-  --enable-bzlib           enable bzlib [autodetect]
+  --disable-bzlib          disable bzlib [autodetect]
   --enable-fontconfig      enable fontconfig
   --enable-frei0r          enable frei0r video filtering
   --enable-gnutls          enable gnutls [no]
-  --enable-iconv           enable iconv [autodetect]
+  --disable-iconv          disable iconv [autodetect]
   --enable-libaacplus      enable AAC+ encoding via libaacplus [no]
   --enable-libass          enable libass subtitles rendering [no]
   --enable-libbluray       enable BluRay reading using libbluray [no]
@@ -240,7 +240,7 @@ External library support:
   --enable-opencl          enable OpenCL code
   --enable-openssl         enable openssl [no]
   --enable-x11grab         enable X11 grabbing [no]
-  --enable-zlib            enable zlib [autodetect]
+  --disable-zlib           disable zlib [autodetect]
 
 Advanced options (experts only):
   --cross-prefix=PREFIX    use PREFIX for compilation tools [$cross_prefix]