docs: update TODO

Signed-off-by: Karel Zak <kzak@redhat.com>
lscpu: cleanup DMI code [coverity scan]

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: fix possible memleak [coverity scan]

Signed-off-by: Karel Zak <kzak@redhat.com>
su: fix caught_signal logic and initialize oldact [coverity scan]

Signed-off-by: Karel Zak <kzak@redhat.com>