This avoids the need for a confusing line of the form:
DEINSTALL_TEMPLATE+= path/to/INSTALL
in the package Makefile, and actually removes the need to specify it
altogether since by convention, the existence of the DEINSTALL script
is enough to add it to DEINSTALL_TEMPLATE.
desktop-file-utils contains a couple of command line utilities for working
with desktop entries and the applications database. More specifically,
it contains the update-desktop-database utility, used to rebuild the database
that connects MIME types to applications.