Regenerated C# protos.

csharp/src/Google.Protobuf/WellKnownTypes/Any.cs

diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs
index 378b61d..dd99110 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Any.cs
@@ -159,7 +159,8 @@
     private string typeUrl_ = "";
     /// <summary>
     /// A URL/resource name that uniquely identifies the type of the serialized
-    /// protocol buffer message. The last segment of the URL's path must represent
+    /// protocol buffer message. This string must contain at least
+    /// one "/" character. The last segment of the URL's path must represent
     /// the fully qualified name of the type (as in
     /// `path/google.protobuf.Duration`). The name should be in a canonical form
     /// (e.g., leading "." is not accepted).

csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs

diff --git a/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs b/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs
index ef752be..d1ab0f8 100644
--- a/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs
+++ b/csharp/src/Google.Protobuf/WellKnownTypes/Timestamp.cs
@@ -116,7 +116,7 @@
   /// to this format using [`strftime`](https://docs.python.org/2/library/time.html#time.strftime)
   /// with the time format spec '%Y-%m-%dT%H:%M:%S.%fZ'. Likewise, in Java, one
   /// can use the Joda Time's [`ISODateTimeFormat.dateTime()`](
-  /// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime--
+  /// http://www.joda.org/joda-time/apidocs/org/joda/time/format/ISODateTimeFormat.html#dateTime%2D%2D
   /// ) to obtain a formatter capable of generating timestamps in this format.
   /// </summary>
   public sealed partial class Timestamp : pb::IMessage<Timestamp> {