Log Message:
Adjust the edits to the add-to-xpdfrc file. Do it with SUBST instead
of raw seddery. While here, fix DEINSTALL to more reliably remove the
block this package adds to xpdfrc, and also to avoid stepping on its
own scratch files.

From qjsgkem on freenode.

XXX: This package really shouldn't be munging files in PKG_SYSCONFDIR, but
XXX: that's probably nontrivial to avoid and an issue for some other day.