打卡判断，增加前端浏览器mac获取，当mac获取为空时不判断

LR-20210131IOQH\Administrator

2021-06-10 6f34ab1ed6f8cb79a012a30a7b687e362c6f16c2

 zhengcaioa/zhengcaioa/Startup.cs

@@ -62,6 +62,7 @@
                options.CheckConsentNeeded = context => true;
                options.MinimumSameSitePolicy = SameSiteMode.None;
            });
            services.AddSingleton<IHttpContextAccessor, HttpContextAccessor>();

            var connectionString = Configuration.GetConnectionString("DefaultConnection");
            services.AddDbContext<zhengcaioaContext>(options =>