Log Message:
x11/xtrlock: import pkg

xtrlock is a very minimal X display lock program, which uses
nothing except the Xlib library. It doesn't obscure the screen,
it is completely idle while the display is locked and you don't
type at it, and it doesn't do funny things to the X access control
lists.

Original by Matthias Petermann, fixes by Paolo Vincenzo Olivo in wip