* extensions/update_manager/load_updatemanager.php,
extensions/update_manager/debug.php: fixed the execution of keygen
when there is some wrong in the execution the message for user is
more clean now show "Error in execution the keygen." instead the
message "Error Server authorisation rejected". And added other forms
to get debugData for the update.
MERGED FROM THE BRANCH PANDORA_4.0
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@7176 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f
e60192ed14