simplify identifier values (discussed in #19)

Author: sergiye

OpenHardwareMonitorLib/Hardware/Identifier.cs

@@ -89,10 +89,28 @@ private static void CoerceIdentifiers(string[] identifiers)
         for (int i = 0; i < identifiers.Length; i++)
         {
             string s = identifiers[i];
-            identifiers[i] = Uri.EscapeDataString(identifiers[i]);
+            if (string.IsNullOrEmpty(s))
+                continue;
+
+            var sb = new StringBuilder(s.Length);
+            foreach (char c in s)
+            {
+                if (IsUnreserved(c))
+                    sb.Append(c);
+            }
+            identifiers[i] = sb.ToString();
         }
     }
 
+    private static bool IsUnreserved(char c)
+    {
+        return
+            (c >= 'A' && c <= 'Z') ||
+            (c >= 'a' && c <= 'z') ||
+            (c >= '0' && c <= '9') ||
+            c == '-' || c == '_';// || c == '.' || c == '~';
+    }
+
     /// <inheritdoc />
     public override string ToString()
     {