Prepare 3.5.6
Merge remote-tracking branch 'origin/3.5' into 3.6

Conflicts:
	build/debian/changelog
	build/exe/doliwamp/doliwamp.iss
	build/rpm/dolibarr_fedora.spec
	build/rpm/dolibarr_generic.spec
	build/rpm/dolibarr_mandriva.spec
	build/rpm/dolibarr_opensuse.spec
	htdocs/filefunc.inc.php