XWIKI-7879: Refactor to confine delegation of programming rights.

.../xwiki/container/servlet/XWikiServletContextListener.java

.../servlet/internal/DefaultServletContainerInitializer.java

...xwiki-platform-display/xwiki-platform-display-api/pom.xml

...org/xwiki/display/internal/AbstractDocumentDisplayer.java

...wiki/display/internal/AbstractDocumentTitleDisplayer.java

...g/xwiki/display/internal/ConfiguredDocumentDisplayer.java

.../org/xwiki/display/internal/DefaultDocumentDisplayer.java

.../org/xwiki/display/internal/DocumentContentDisplayer.java

...in/java/org/xwiki/display/internal/DocumentDisplayer.java

...m-extension/xwiki-platform-extension-distribution/pom.xml

...i/extension/distribution/internal/DistributionAction.java

...iki-platform-index-ui/src/main/resources/Main/AllDocs.xml

...a/org/xwiki/ircbot/internal/wiki/DefaultWikiIRCModel.java

xwiki-platform-core/xwiki-platform-oldcore/pom.xml

...i-platform-oldcore/src/main/java/com/xpn/xwiki/XWiki.java

...rm-oldcore/src/main/java/com/xpn/xwiki/XWikiConstant.java

...orm-oldcore/src/main/java/com/xpn/xwiki/XWikiContext.java

...platform-oldcore/src/main/java/com/xpn/xwiki/api/Api.java

...orm-oldcore/src/main/java/com/xpn/xwiki/api/Document.java

...atform-oldcore/src/main/java/com/xpn/xwiki/api/XWiki.java