Add user agent to web request details

This allows us to quickly identify if spesific browsers are the cause of
errors or problems (especially useful to detect crawlers attempting
paths or queries they clearly shouldn't).

Author: evest

Src/StackifyLib/Models/WebRequestDetail.cs

@@ -47,10 +47,12 @@ public WebRequestDetail(StackifyError error)
         [JsonProperty]
         public string ReportingUrl { get; set; }
 
-
         [JsonProperty]
         public string ReferralUrl { get; set; }
 
+        [JsonProperty]
+        public string UserAgent { get; set; }
+
         [JsonProperty]
         public Dictionary<string, string> Headers { get; set; }
 
@@ -90,6 +92,7 @@ private void Load(HttpContext context)
             {
                 HttpMethod = request.RequestType;
                 UserIPAddress = request.UserHostAddress;
+                UserAgent = request.UserAgent;
 
                 if (context.Items != null && context.Items.Contains("Stackify.ReportingUrl"))
                 {