[FEATURE] HMENU - sectionIndex: where clause should be configurable

[FEATURE] HMENU - sectionIndex: where clause should be configurable

This changeset implements the sectionIndex setting
"useColPos" that can be used to change the colPos
query filter. A negative value drops the filter
completely. Only integers are allowed as values
and stdWrap is possible.

Example:
tt_content.menu.20.3.1.sectionIndex.useColPos = -1

Change-Id: Ic65cdee014aa7972e3d28504a678a001355ed312
Resolves: #21142
Releases: 6.0
Reviewed-on: http://review.typo3.org/11251
Reviewed-by: Wouter Wolters
Tested-by: Wouter Wolters
Reviewed-by: Stefan Neufeind
Reviewed-by: Georg Ringer
Tested-by: Georg Ringer
Reviewed-by: Stefan Galinski
Tested-by: Stefan Galinski