Add documentation on Session tracking

[jecisc]

It would be great to have a page in the wiki with a description, the pro and cons of each session tracking strategy and also an explanation of how to change the session tracking programmatically.

If I find the time to learn enough on that I might try to propose a page, but I don't know if I'll have the time.

[marschall]

Yes, this comes up frequently. The classes have a few lines of comments but don't go into the pros and cons.

[jecisc]

I succeeded to change the tracking strategy using this piece of code:

MyApp class>>initialize
	^ (WAAdmin register: self asApplicationAt: self appName)
		preferenceAt: #sessionClass put: MDLDemoSession;
		preferenceAt: #trackingStrategy put: WACookieForBrowserIPForCrawlerTrackingStrategy new;
		addLibrary: JQDeploymentLibrary;
		addLibrary: MDLLibrary;
		addLibrary: MDLDemoLibrary;
		yourself

[marschall]

Yes, this looks good.