Add items to the change report (#298)

src/site/markdown/change-report-gh.md

@@ -51,13 +51,23 @@ The following issues have been addressed:
 
 * The `locale` external character encoding option reverting to US-ASCII \[[LOGCXX-483](https://issues.apache.org/jira/browse/LOGCXX-483)\]
 * A segfault during process exit when log4cxx::LogManager::shutdown is not called
+* The cmake option to include a MultiprocessRollingFileAppender did not work
+* Build failure in a MSYS2 environment
+* Format settings (e.g. std::hex) were retained across LOG4CXX_XXXXX macro logging requests
+* When the APR library was built without support for threads (APR_HAS_THREADS=0):
+    * the AsyncAppender and dynamically loaded configuration changes were not available
+    * a single nested/mapped diagnostic context (NDC/MDC) would be used and updated (without synchronization)
 
 Release 1.2.0 includes the following new features:
 
 * LOG4CXX_XXXX macros now support logging of QStrings directly
 * log4cxx::hexdump function that returns a string of hexadecimal byte values
 * Ability to remove a HierarchyEventListener \[[#233](https://github.com/apache/logging-log4cxx/issues/233)\]
 * Less string copying when sending a logging event to an appender
+* Allow thread information to be included in JSON formatted output
+* Optional support for logging during process termination \[[#271](https://github.com/apache/logging-log4cxx/pull/271)\]
+* A cmake option to place Log4cxx functions in a different namespace \[[#277](https://github.com/apache/logging-log4cxx/pull/277)\]
+* Optionally use std::format in LOG4CXX_XXXX_FMT macros instead of fmt::format \[[#291](https://github.com/apache/logging-log4cxx/pull/291)\]
 
 Note: the `LOG4CXX_CHARSET` cmake option (external character encoding) default value has changed to `utf-8`