Xcms.txt, XErrorDB neccessary?

[uli42]

We are distributing Xcms.txt with nx-x11-common:

$ dpkg -L nx-x11-common
/.
/usr
/usr/share
/usr/share/fonts
/usr/share/fonts/X11
/usr/share/nx
/usr/share/nx/SecurityPolicy
/usr/share/nx/X11
/usr/share/nx/X11/Xcms.txt
/usr/share/nx/X11/XErrorDB
/usr/share/doc
/usr/share/doc/nx-x11-common
/usr/share/doc/nx-x11-common/copyright
/usr/share/doc/nx-x11-common/changelog.Debian.gz
/usr/share/nx/fonts

Xcms.txt comes from the libX11 part. Interestingly the libx11* packages from Ubuntu do not deliver Xcms.txt. So I am wondering if we really need to ship it at all.

For XErrorDB we could instead add a dependency to libx11-data and use that one.

The above holds true for Debian and Ubuntu, for Redhat and derivates I have not checked yet.