SORRY.incl : import from nuxeo host

SORRY.incl

+## "SORRY" SERVER
+##
+## Otheus - 2016-10-18
+##
+## If /etc/httpd/MAINTENANCE exists,
+## Then for ALL Requests, return 503 and content of /var/www/html/sorry/503.html
+## UNLESS request IP/host is in /etc/httpd/maintenance-bypass-hosts.txt
+##
+## To disable, simply remove/rename /etc/httpd/MAINTENANCE file.
+## (but don't remove the bypass-hosts file, or server will fail to start)
+##
+## To use: include this file in each virtualhost
+
+RewriteEngine On
+## Restart server if you change this
+RewriteMap hosts-bypass-maint  "txt:/etc/httpd/maintenance-bypass-hosts.txt"
+
+# IF not in maintenance, skip 3 rules
+RewriteCond "/var/www/MAINTENANCE" !-f
+RewriteRule ^ - [S=3]
+
+# IF one of the excluded hosts, skip 2 rules
+RewriteCond "${hosts-bypass-maint:%{REMOTE_ADDR}|%}" "!=%"
+RewriteRule ^ - [S=2]
+
+# IF not already being redirected due to 503, redirect
+# with a 503 status and to appropriate page.
+RewriteCond %{ENV:REDIRECT_STATUS} !=503
+RewriteRule ^(.*)$ /$1 [L,R=503]
+
+# No more rewrite rules in this path (prevents HTTPS redirection or other redirects)
+RewriteRule ^ - [L]
+
+#LogLevel rewrite:trace5
+ErrorDocument 503 /sorry/503.html
+<Directory /var/www/html/sorry>
+    Require all granted
+</Directory>