Macros in #includePage calls cannot access the current HttpServletRequest object

When a macro is executed in a page which is included via #includePage (eg using the 'left-navigation' theme), it gets <code>null</code> back when ServletActionContext.getRequest() is called.

Also, the same effect is observed when a macro is executed in the 'Site Welcome Message'.

This makes it difficult to detect the current user (my current problem) as well as things like query parameters, etc.