Import lwIP contrib rep

... from http://git.savannah.gnu.org/cgit/lwip/lwip-contrib.git/ into contrib/ subdir, STABLE-2_1_0_RELEASE tag
lwIP contrib is now officially frozen
TODO: Fix build

contrib/apps/LwipMibCompiler/SharpSnmpLib/Mib/MibDocument.cs

@@ -0,0 +1,57 @@
+/*
+ * Created by SharpDevelop.
+ * User: lextm
+ * Date: 2008/5/17
+ * Time: 17:38
+ * 
+ * To change this template use Tools | Options | Coding | Edit Standard Headers.
+ */
+
+using System.Collections.Generic;
+
+namespace Lextm.SharpSnmpLib.Mib
+{
+    /// <summary>
+    /// MIB document.
+    /// </summary>
+    public sealed class MibDocument
+    {
+        private readonly List<IModule> _modules = new List<IModule>();
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MibDocument" /> class.
+        /// </summary>
+        /// <param name="file">The file.</param>
+        public MibDocument(string file)
+            : this(new Lexer(file))
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="MibDocument"/> class.
+        /// </summary>
+        /// <param name="lexer">The lexer.</param>
+        public MibDocument(Lexer lexer)
+        {
+            ISymbolEnumerator symbols = lexer.GetEnumerator();
+
+            Symbol current;
+            while ((current = symbols.NextNonEOLSymbol()) != null)
+            {
+                symbols.PutBack(current);
+                _modules.Add(new MibModule(symbols));                
+            }
+        }
+        
+        /// <summary>
+        /// <see cref="MibModule"/> containing in this document.
+        /// </summary>
+        public IList<IModule> Modules
+        {
+            get
+            {
+                return _modules;
+            }
+        }
+    }
+}