[smuxi] Engine(-Tests): support IDN TLDs

[Mirco M. M. Bauer <mmmbauer src gnome org>]

commit 515ab1291354f2146f3b230c19f2bb94c196332c
Author: Mirco Bauer <meebey meebey net>
Date:   Tue Sep 1 18:57:57 2015 +0200

    Engine(-Tests): support IDN TLDs
    
    The 2nd level domain name and also top-level domain names can contain puny-code
    and thus unicode letters.

 src/Engine-Tests/MessageBuilderTests.cs     |    6 ++++++
 src/Engine/Config/MessageBuilderSettings.cs |    2 +-
 2 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/src/Engine-Tests/MessageBuilderTests.cs b/src/Engine-Tests/MessageBuilderTests.cs
index 74ba179..b63e568 100644
--- a/src/Engine-Tests/MessageBuilderTests.cs
+++ b/src/Engine-Tests/MessageBuilderTests.cs
@@ -615,6 +615,12 @@ namespace Smuxi.Engine
             builder.TimeStamp = DateTime.MinValue;
             builder.Append(new UrlMessagePartModel(msg));
             TestMessage(msg, builder.ToMessage());
+
+            msg = "http://مثال.ايران/";;
+            builder = new MessageBuilder();
+            builder.TimeStamp = DateTime.MinValue;
+            builder.Append(new UrlMessagePartModel(msg));
+            TestMessage(msg, builder.ToMessage());
         }
 
         [Test]
diff --git a/src/Engine/Config/MessageBuilderSettings.cs b/src/Engine/Config/MessageBuilderSettings.cs
index f49c33a..cf7b7e1 100644
--- a/src/Engine/Config/MessageBuilderSettings.cs
+++ b/src/Engine/Config/MessageBuilderSettings.cs
@@ -75,7 +75,7 @@ namespace Smuxi.Engine
             string domain_chars = @"[a-z0-9\-\p{L}]+";
             string subdomain = domain_chars + @"\.";
             string common_tld = @"de|es|im|us|com|net|org|info|biz|gov|name|edu|onion|museum";
-            string any_tld = @"[a-z]+";
+            string any_tld = @"[a-z\p{L}]+";
             string ip6 = @"(?:[0-9a-f]{0,4}:){1,7}[0-9a-f]{1,4}";
             string quoted_ip6 = @"\[" + ip6 + @"\]";
             string ip4 = @"(?:[0-9]{1,3}\.){3}[0-9]{1,3}";