Updated changelog and upgrade guide to include dirsumtime patch #642

docs/changes.txt

@@ -1,7 +1,7 @@
-weewx change history
+WeeWX change history
 --------------------
 
-4.3.1 MM/DD/YYYY
+4.4.0 MM/DD/YYYY
 
 Patching process is more forgiving about records with interval less than or
 equal to zero.
@@ -21,6 +21,12 @@ issue #639.
 Fixed problem that could cause program to crash if asking for deltas of a non-
 existent key.
 
+The version 4.3.0 patch to fix the incorrect calculation of sums in the daily
+summary tables itself contained a bug. This version includes a patch to fix the
+problem. It runs once at startup. Fixes issue #642.
+
+Weighting of the daily summaries now included in the test suite.
+
 
 4.3.0 01/04/2020
 

docs/upgrading.htm

@@ -250,6 +250,17 @@ <h1>Upgrading the configuration file, <span class="code">weewx.conf</span></h1>
 
         <h1><a id="Instructions_for_specific_versions">Instructions for specific versions</a></h1>
 
+        <h2>Upgrading to V4.4</h2>
+
+        <h3>Auto patch of daily summaries</h3>
+
+        <p>
+            The V4.2 daily summary patch inadvertently introduced a bug which caused the <span class="code">wind</span>
+            daily summary to be incorrectly weighted. See issue <a href="https://github.com/weewx/weewx/issues/642">#642</a>.
+            V4.4 includes a patch to automatically fix the defective daily summary. It is run only once on the first use
+            of a database (usually by <span class="code">weewxd</span>) and takes only a few seconds.
+        </p>
+
         <h2>Upgrading to V4.3</h2>
 
         <h3>Auto patch of daily summaries</h3>