static_http_* options are completely ignored by OpenERP

[Leonardo Donelli]

OpenERP completely ignores the static_http options:
static_http_enable
static_http_document_root
static_http_url_prefix

The function `init_static_http` is never called in the code, nor the class StaticHTTPHandler, given that is called only in the `init_static_http` function.

As a result of this, there are no options for configuring openerp under a reverse proxy in a subdirectory, like http://mydomainnotreally.com/openerp and to do it correctly you have to use advanced url rewrite rules which may not always work.