Log Message:
xmlcatmgr: drop MESSAGE

the pkgsrc guide now comments that MESSAGE should not be used for:

"anything that should be explained in the
installation/configuration documentation that should
come with the package"

xmlcatmgr is commonly installed as a dependency and the MESSAGE file
simply explains what is essentially unix/pkgsrc conventions (share/
is where the static data is, etc/ is where the user-specified data
is), so this is mostly line noise.