[TASK] Clean up phpDoc comments in t3lib_befunc

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

Change-Id: Iab137d8c601aa543abdd5dcf4aeae55454a77fd4
Resolves: #36886
Releases: 6.0
Reviewed-on: http://review.typo3.org/11028
Reviewed-by: Tolleiv Nietsch
Tested-by: Tolleiv Nietsch
Reviewed-by: Philipp Gampe
Tested-by: Philipp Gampe
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn