Log Message:
Update UDFclient to version 0.7.0

Enhance UDFclient with ideas and features from my NetBSD kernel implementation
enhancing directory operations and fixing potential lockups on 512
bytes/sector media, repaired NetBSD harddisc support and fixed a few
compilation warnings when compiled with '-Wextra' revealing some possible
bugs. Enhanced cd_disect to display some more disc types. Also included some
patches to fix possible buffer screwups; thanks Andrey!