SNTP 时间同步客户端

SNTP客户端（Client）的C语言版，可以移植到很多平台上，有一定的参考价值。-SNTP client (Client) of the C language version, can be transplanted to many platforms, there is a certain reference value.

ntp技术协议规范，ntp网络对时的协议格式及算法说明-ntp sntp protocol

SNTP tools A class for retrieving data a NTP/SNTP server. <summary> Gets whether the SNTPClient is busy. </summary> <returns>Whether the SNTPClient is busy.</returns>-SNTP tools A class for retrieving data