build: set FD_SETSIZE to 1024

The default value is 64.

https://docs.microsoft.com/zh-cn/windows/win32/api/winsock2/nf-winsock2-select
https://stackoverflow.com/questions/7976388/increasing-limit-of-fd-setsize-and-select

Author: myfreeer

nginx-build-msys2.sh

@@ -98,6 +98,7 @@ configure_args=(
     --http-fastcgi-temp-path=temp/fastcgi \
     --http-scgi-temp-path=temp/scgi \
     --http-uwsgi-temp-path=temp/uwsgi \
+    --with-cc-opt=-DFD_SETSIZE=1024 \
     --with-http_realip_module \
     --with-http_addition_module \
     --with-http_sub_module \