Hello,

Here is the updated patch. Changes from the previous version:

- 'void*' and 'const void*' used instead of char* and const char*;
- 'reqlen' argument renamed to 'buflen' (it IS the buffer length);
- man pages updated accordingly.

Because Curl_write() accepts argument of type 'void*', and not 'const
void*', there is a warning when you compile with GCC:

easy.c: In function `curl_easy_send':
easy.c:1131: warning: passing arg 3 of `Curl_write' discards qualifiers
from pointer target type

In future, it would be nice to change 'void*' to 'const void*' for
Curl_write() and other functions that are not supposed to modify the
buffers. So, the warning could serve as a reminder. :)

Please feel free to comment.