RewriteEngine On

Alias /wikidata/ "/srv/web/wiki/htdocs/"

RewriteCond %{REQUEST_METHOD} POST
RewriteRule ^/wiki/(.+)$        http://app1/wiki/ [P,L]

RewriteRule ^/wiki/(.+)$      balancer://wikiCluster/wiki/$1 [P,L]
RewriteRule ^/wiki/$      balancer://wikiCluster/wiki/$1 [P,L]
RewriteRule ^/docroot(.+)$      balancer://wikiCluster/docroot$1 [P,L]