Merge v1.21.0, v1.20.0 into 2

.env.example

@@ -185,3 +185,8 @@ REQUIRE_AWS_SDK_PATH=C:\Lib\aws\aws-autoloader.php
 
 # add theme dir.
 #ADD_THEME_DIR=C:\SitesLaravel\theme\
+
+# support info (If there is a support URL and if a viewing password is required.)
+#COMMON_SUPPORT_URL=""
+#INDIVIDUAL_SUPPORT_URL=""
+#INDIVIDUAL_SUPPORT_PASSWORD=""