[TYPO3-core] RFC: #13611: Replace calls to t3lib_div:: within t3lib_div to self:: du to performance reasons

[Benjamin Mack]

Hey Georg,

+1 by reading and testing, using BE and FE for a while, with no problems 
whatsoever.

Committed to trunk (rev. 7043).
Committed to TYPO3_4-3 (rev. 7044) (I got the OK from Olly)

All the best,
Benni.