Updated xtrlock.c to 2.3, integrated transparent cursor, deleted debian packaging files

**Deleted Debian/:**
Since this is not a debian repository package, in the event of compiling and installing as a debian package any update to the xtrlock at the debian repositories will override this.
**Deleted mask.bitmap lock.bitmap and patchlevel.h:**
integrated minimized mask.bitmap and lock.bitmap in xtrlock.c
removed patchlevel.h because it is outdated and not properly maintained in 2.3
**Updated xtrlock to 2.3**
Updated xtrlock.c to 2.2 as it is published in launchpad. [the diff](https://launchpadlibrarian.net/108899911/xtrlock_2.0-14_2.2.diff.gz)
Updated xtrlock.man to 2.3 (remover reference to xlock)