Initial original copy of login directory from Moodle v2.6.3.
Replaced URLs that contain '/login/' with '/internallogin/' by running: for file in *.{php,html}; do sed -i 's|/login/|/internallogin/|g' $file; done
Stopped alternateloginurl and corrected url returned by get_login_url().
Merge Moodle v2.6.3 changes into MOODLE_26_STABLE