[REVERT] revert commit 5210 chs@openerp.com-20140130150628-qqbno0nu8mp27b9u: bring back magic

bzr revid: chs@openerp.com-20140130162041-63wbcsq1udxw529f

openerp/http.py

@@ -963,6 +963,9 @@ class Root(object):
             httprequest.session.logout()
             db = None
 
+        if not db:
+            httprequest.session.db = db_monodb(httprequest)
+
     def setup_lang(self, httprequest):
         if not "lang" in httprequest.session.context:
             lang = httprequest.accept_languages.best or "en_US"