Description:
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translation of curl_setopt CURLOPT_READFUNCTION description in simplifed chinese 
is wrong.

in english:
The name of a callback function where the callback function takes three 
parameters. The first is the cURL resource, the second is a stream resource 
provided to cURL through the option CURLOPT_INFILE, and the third is the maximum 
amount of data to be read. The callback function must return a string with a 
length equal or smaller than the amount of data requested, typically by reading 
it from the passed stream resource. It should return an empty string to signal 
EOF.

the correct chinese translation should be:
回调函数名。该函数应接受三个参数。第一个是 cURL resource；第二个是通过选项 
CURLOPT_INFILE 传给 cURL 的 stream resource；第三个参数是最大可以读取的数据的数量。回
调函数必须返回一个字符串，长度小于或等于请求的数据量（第三个参数）。一般从传入的 stream 
resource 读取。返回空字符串作为 EOF（文件结束） 信号。


Test script:
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none


Expected result:
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none

Actual result:
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none