[TASK] Clean up phpDoc comments in t3lib classes

Clean up phpDoc comments for the following classes:

* t3lib/class.t3lib_pagerenderer.php
* t3lib/class.t3lib_pagetree.php
* t3lib/class.t3lib_parsehtml.php

Clean up provides:

* Provide correct parameter names in phpDoc
* Provide correct data types in phpDoc
* CGLify phpDoc (remove tabs)

Change-Id: I56ffee774456d7712cf68cbd74652aad1b0f07bb
Resolves: #37242
Releases: 6.0
Reviewed-on: http://review.typo3.org/11265
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn