Fix: Doxygen problems

build/doxygen/doxygen_footer.html

htdocs/admin/agenda_other.php

htdocs/cashdesk/deconnexion.php

htdocs/cashdesk/facturation_dhtml.php

htdocs/cashdesk/facturation_verif.php

htdocs/cashdesk/index_verif.php

htdocs/cashdesk/validation.php

htdocs/cashdesk/validation_ok.php

htdocs/cashdesk/validation_ticket.php

htdocs/cashdesk/validation_verif.php

htdocs/comm/admin/propal_extrafields.php

htdocs/comm/propal/document.php

htdocs/comm/propal/info.php

htdocs/comm/propal/list.php

htdocs/comm/propal/note.php

htdocs/comm/propal/tpl/linkedobjectblock.tpl.php