Add spamStopWords to default WebGUI config file, and add upgrade snippet. Fixes bug #11721.

docs/changelog/7.x.x.txt

@@ -15,6 +15,7 @@
  - fixed #11455: Wrong use of Extras macro?
  - fixed #11715: "Empty" user profile fields: not in userProfileData / cannot delete
  - fixed #11718: Matrix does not URI encode search parameters
+ - fixed #11721: spamStopWords not in WebGUI.conf.original
 
 7.9.8
  - fixed #11651: First Day of Week is a string...

docs/upgrades/upgrade_7.9.8-7.9.9.pl

@@ -35,6 +35,7 @@ my $session = start(); # this line required
 addIndexToUserSessionLog($session);
 addHeightToCarousel($session);
 synchronizeUserProfileTables($session);
+addSpamStopWordsToConfig($session);
 
 finish($session); # this line required
 
@@ -48,6 +49,16 @@ finish($session); # this line required
 #    print "DONE!\n" unless $quiet;
 #}
 
+#----------------------------------------------------------------------------
+# Describe what our function does
+sub addSpamStopWordsToConfig {
+    my $session = shift;
+    print "\tAdd SPAM controls to config file... " unless $quiet;
+    # and here's our code
+    $session->config->set('spamStopWords', []);
+    print "DONE!\n" unless $quiet;
+}
+
 #----------------------------------------------------------------------------
 # Describe what our function does
 sub addIndexToUserSessionLog {