语法: udpsock:settimeout(time)
环境: rewrite_by_lua, access_by_lua*, content_by_lua*, ngx.timer.**
设置随后的 socket 操作（例如 receive）的超时时间（毫秒为单位）。
通过该方法设置内容相比这些配置指令有更高的优先级，例如：lua_socket_read_timeout。
该特性在 v0.5.7 版本首次引入。
English source:
syntax: udpsock:settimeout(time)
context: rewrite_by_lua, access_by_lua*, content_by_lua*, ngx.timer.**
Set the timeout value in milliseconds for subsequent socket operations (like receive).
Settings done by this method takes priority over those config directives, like lua_socket_read_timeout.
This feature was first introduced in the v0.5.7 release.