Version 1.2.0 RC4: Fix a problem when resaving slave site with symbolic link

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EU e-Privacy Directive
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Fix a problem when check the symbolic link present for a slave site
On some hosting provider or PHP version (5.2.8) - we don't know really the conditins, it may happen that the Symbolic Link verification performed by JMS may fail when using relative path.
The problem was reported when resaving an existing slave site.
In this case, JMS check the existing link to verify they are compatible with the current saving request.
It read the current link path using query based on relative path.
In this version, when the query fail using a relative path, JMS retry a similar query using a full path.
The symptom was "unable to create Symbolic Link"
Add verification on the Sharing definitions to avoid error in case of wrong XML files layout.
Add a verification that the "template" is written.
It may happen that permission on the directory does not autorize to write the "config_template.php" file.

EU e-Privacy Directive