added release notes for #247 and #256

Author: FreeAndNil

src/changelog/3.1.1/245-ndc-inherit.xml

@@ -7,6 +7,6 @@
   <issue id="246" link="https://github.com/apache/logging-log4net/pull/246"/>
   <description format="asciidoc">
     Fix InvalidCastException in NDC.Inherit(System.Collections.Stack)
-    (reported by @jberg7, implemented by @freeandnil in https://github.com/apache/logging-log4net/pull/246[#246])
+    (reported by @jberg7, fixed by @FreeAndNil in https://github.com/apache/logging-log4net/pull/246[#246])
   </description>
 </entry>

src/changelog/3.1.1/247-stucked-date-patterns.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<entry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns="https://logging.apache.org/xml/ns"
+       xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
+       type="fixed">
+  <issue id="247" link="https://github.com/apache/logging-log4net/issues/247"/>
+  <issue id="248" link="https://github.com/apache/logging-log4net/pull/248"/>
+  <description format="asciidoc">
+    Fix caching of time strings in AbsoluteTimeDateFormatter (reported by @LeadAssimilator, fixed by @FreeAndNil in https://github.com/apache/logging-log4net/pull/248[#248])
+  </description>
+</entry>

src/changelog/3.1.1/256-unsubscibe-appdomain-eventhandlers.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<entry xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+       xmlns="https://logging.apache.org/xml/ns"
+       xsi:schemaLocation="https://logging.apache.org/xml/ns https://logging.apache.org/xml/ns/log4j-changelog-0.xsd"
+       type="fixed">
+  <issue id="256" link="https://github.com/apache/logging-log4net/pull/256"/>
+  <description format="asciidoc">
+    Shutdown: Unsubscribe from AppDomain event handlers (by @Flohack74)
+  </description>
+</entry>

src/log4net/Core/LoggerManager.cs

@@ -339,7 +339,7 @@ public static ILogger GetLogger(Assembly repositoryAssembly, Type type)
   /// </remarks>
   public static void Shutdown()
   {
-    //Cleanup event handlers since they only call this mathod anyways
+    // Cleanup event handlers since they only call this method anyway
     AppDomain.CurrentDomain.ProcessExit -= OnProcessExit;
     AppDomain.CurrentDomain.DomainUnload -= OnDomainUnload;