Remove all sessionsIds put in URLs

We should always use sessionIds in cookies and newer have sessionsIds in URLs. So I will remove all sessionsIds in URLs. There are 2 cases:

1. the part related to spiders in RequestHandler
2. HtmlFormRenderer.appendExternalLoginKey() (there is also an appendExternalLoginKey method in MacroFormRenderer class but it's not used OOTB)

There are also many cases where we show the sessionId in logs (using UtilHttp.getSessionId()) I wonder if we should not keep those commented out or change the debug info level. Also HttpSessionEvent.getSession().getId() is directly used in some places for the same purpose (log)