MDL-29917 prevent form autocompletion in most Moodle forms

MDL-29917 prevent form autocompletion in most Moodle forms

The password autocompletion in case of Moodle makes sense only on the login page, the form autocompletion in general is most probably useful only on the user signup page.

This patch is compatible with html 5, unfortunately we have to ignore strict warnings in legacy xhtml 1.0 standard.