[smuxi] Engine(-Tests): fixed parsing IRC URIs like irc://freenode/smuxi

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

commit acb7126a0f70be9729f42114b7e2de667363abf8
Author: Mirco Bauer <meebey meebey net>
Date:   Fri Jan 30 13:19:54 2015 +0100

    Engine(-Tests): fixed parsing IRC URIs like irc://freenode/smuxi
    
    IRC network names do not contain any . like DNS names do, thus we need to
    allow bare hostnames.

 src/Engine-Tests/MessageBuilderTests.cs     |    8 +++++++-
 src/Engine/Config/MessageBuilderSettings.cs |    5 +++--
 2 files changed, 10 insertions(+), 3 deletions(-)
---
diff --git a/src/Engine-Tests/MessageBuilderTests.cs b/src/Engine-Tests/MessageBuilderTests.cs
index 9d481e9..094cd51 100644
--- a/src/Engine-Tests/MessageBuilderTests.cs
+++ b/src/Engine-Tests/MessageBuilderTests.cs
@@ -1,6 +1,6 @@
 // Smuxi - Smart MUltipleXed Irc
 //
-// Copyright (c) 2013-2014 Mirco Bauer <meebey meebey net>
+// Copyright (c) 2013-2015 Mirco Bauer <meebey meebey net>
 //
 // Full GPL License: <http://www.gnu.org/licenses/gpl.txt>
 // 
@@ -559,6 +559,12 @@ namespace Smuxi.Engine
             builder.TimeStamp = DateTime.MinValue;
             builder.Append(new 
UrlMessagePartModel("https://web.archive.org/web/20050208144213/http://www.jaganelli.de/";));
             TestMessage(msg, builder.ToMessage());
+
+            msg = "irc://freenode/smuxi";
+            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 18ac096..c58bec5 100644
--- a/src/Engine/Config/MessageBuilderSettings.cs
+++ b/src/Engine/Config/MessageBuilderSettings.cs
@@ -1,6 +1,6 @@
 // Smuxi - Smart MUltipleXed Irc
 //
-// Copyright (c) 2011, 2014 Mirco Bauer <meebey meebey net>
+// Copyright (c) 2011, 2014-2015 Mirco Bauer <meebey meebey net>
 //
 // Full GPL License: <http://www.gnu.org/licenses/gpl.txt>
 //
@@ -80,7 +80,8 @@ namespace Smuxi.Engine
             string ip4 = @"(?:[0-9]{1,3}\.){3}[0-9]{1,3}";
             string ip = "(?:" + ip4 + "|" + ip6 + "|" + quoted_ip6 + ")";
             string domain = @"(?:(?:" + subdomain + ")+(?:" + any_tld + ")|localhost)";
-            string host = "(?:" + domain + "|" + ip + ")";
+            string bare_host = @"[a-z]+";
+            string host = "(?:" + domain + "|" + bare_host + "|" + ip + ")";
             string short_number = "[1-9][0-9]{,4}";
             string port = ":" + short_number;
             string user = "[a-z0-9._%+-]+@";