buaazp: update readme

README.md

@@ -21,7 +21,7 @@ http://demo.buaa.us/5f189d8ec57f5a5a0d3dcba47fa797e2?w=500&h=500&g=1&x=0&y=0&r=4
 
 - The parameters contain width, height, resize type, gray, crop postion (x, y), rotate, quality and format. And you can control the default type of images by configuration file.  
 And you can get the information of image in zimg server like this:  
-http://demo.buaa.us/5f189d8ec57f5a5a0d3dcba47fa797e2?info=1
+http://demo.buaa.us/info?md5=5f189d8ec57f5a5a0d3dcba47fa797e2
 
 - If you want to customize the transform rule of image you can write a zimg-lua script. Use `t=type` parameter in your URL to get the special image:  
 [http://demo.buaa.us/5f189d8ec57f5a5a0d3dcba47fa797e2?t=webp500](http://demo.buaa.us/5f189d8ec57f5a5a0d3dcba47fa797e2?t=webp500)