Version 1.0.8: Fix problem of registration when CURL extension is not installed

Fix bug when CURL is not present.
Some PHP environment does not contain the CURL extension.
In this case, the registration of the product as well the "Check for Update" was not available.
This version fix this problem to include specific code to replace the CURL PHP extension.

Fix inconsistency between the "configuration.php" patch installed by the installation and the patch that is applied by "Global Configuration" update.

Fix some error messages that could be reported during the uninstall of the extension and after having uninstall
the patches. The errors appears when trying to remove a file that is already removed