* Makefile.in (do-install): Don't remove a destination directory

* Makefile.in (do-install): Don't remove a destination directory
	if it's the same as the source.  If ${srcdir}/info == ${infodir},
	don't try to copy the info files.

	* Makefile.in (COPYDIR, COPYDESTS): Don't mention etc twice; this
	doesn't work if you're not using a separate source directory.
	(do-install): Copy the build tree's etc directory only after
	making sure it's not also the source tree's etc directory.