reloading the user list after the delete action will make sure the count
is always correct.

This is needed to replace the password generator by a plugin
implementation. Related to PR #166 and FS#2147

Do not pass timelimit and deref settings to ldap_search. These values
should be set globally via ldap_set_option() instead (as we do for
deref).

This reverts commit 37764cbb.

adLDAP renamed the ad_username and ad_password to admin_username
admin_password recently. this makes our backend recognize the old
settings

again)

canDo getUsers to false when unavailable

This reverts commit ba09710a.

Conflicts:
	lib/plugins/authad/lang/de/settings.php