large packages: install but not load

[Dan Jacobson <jidanni@jidanni.org>]

I probably use the mule-ucs package once a year, but to have it
installed means that it gets loaded every time I start emacs.

Perhaps dpkg-reconfigure mule-ucs [and other hefty packages] could ask
if one wants to have the package on one's system, but not loaded.

One might say one could just install and remove the package when
needed. But for offline users, that is bad.

By the way, if in the future dpkg-reconfigure will be used to set
non-loading, it shouldn't go ahead and do
remove/mule-ucs: Handling removal of emacsen flavor emacs21 ... done.
install/mule-ucs: Byte-compiling for emacs21 ...This will take a while ... done.
if not necessary.