[TYPO3-team-core-v5] Character problem in Cache Framework

[Steffen Kamper]

Hi,

there is a serious problem in v4 with backported cache framework.
The "-" is not allowed character as Tag, which leads to a crash in v4, 
as versioning/workspaces use negative pids, which leads to a tag like 
"pageId_-1"

Olly already made a ticket which can be found here:
http://forge.typo3.org/issues/show/2982

I made a patch for v4 which allows the "-", but maybe the problem is, 
that this char is used as seperator in file backend.
My patch can be found here:
http://bugs.typo3.org/view.php?id=10741

This issue has to be solved urgently, and we hope to get a common 
solution for having same framework in both systems, so please have a 
look at.

vg Steffen