official modular Xorg release of libXt.
This is so the xt.pc pkg-config file will have "appdefaultdir"
defined.
(I am guessing I am the only person in the pkgsrc world with this problem
since I have systems with libXt from xlibs days.)
This is the X Toolkit Intrinsics library. Xt Intrinsics is a library
of C routines (based on Xlib) used for designing user interfaces
with widgets. It also provides functions for handling events,
initializing windows, and interpreting resource files.
This is from the modular X.org project.
