[TYPO3-core] RFC #11643: Bug: typoLink() sometime wrongly drops url

[Vladimir Podkovanov]

Hi all,

This is an SVN patch request.

Type: Bugfix

Bugtracker references:
http://bugs.typo3.org/view.php?id=11643

Branches: TYPO3_4-1, TYPO3_4-2, trunk

Problem:
When typoLink() produces link to section it checks if the link goes to 
the same page and if there are no additional params added to the link 
and if so url is dropped and only section left. But it fails in such case:

say you have current url: /?index.php&id=1&param1=aaa&param2=bbb
and conf for typolink:
typolink {
   parameter = #anchor
   addQueryString = 1
   addQueryString.exclude = param1,param2
}

the result link should be ?index.php&id=1#anchor
but it is just #anchor

it happens so because only result query string is checked and if all 
parameters are filtered out then the string is empty

Solution:
If 'addQueryString' key is set and 'addQueryString.' key exists too then 
url can't be dropped.

-- 
-rgds-
Vladimir
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