[TYPO3-core] Fixed bug #338: cannot mount pathes beginning with /.foobar/

[Martin Kutschker]

Hi!

class.t3lib_userauthgroup.php::addFilemount had a too rigorous path 
normalization.

I took the quote from Kasper as an ok to change it. This is what I've 
done (to HEAD and TYPO3_4-0):

OLD:
   // remove all slashes and dots before and after the path
$path=ereg_replace('^[\/\. ]*','',$path);
$path=trim(ereg_replace('[\/\. ]*$','',$path));

NEW:
   // remove leading '/' and './', and trailing '/' and '/.'
$path=trim($path);
$path=preg_replace('#^\.?/|/\.?$#','',$path);

Masi