Merge remote-tracking branch 'origin/3.6' into 3.7

Conflicts:
	build/debian/changelog
	build/makepack-dolibarr.pl
	build/makepack-howto.txt
	build/rpm/dolibarr_fedora.spec
	build/rpm/dolibarr_generic.spec
	build/rpm/dolibarr_mandriva.spec
	build/rpm/dolibarr_opensuse.spec
	htdocs/filefunc.inc.php
	htdocs/product/class/product.class.php