allow tables and filter over multiple lines

allow tables and filter over multiple lines

This augments the grammar for tables and filter listing so that a
newline is allowed after a comma.  i.e. these now works as expected:

	table foo {
		"one",
		"two"
	}

	listen on socket filter {
		"foo",
		"bar"
	}

based on a diff from tim@
ok millert@, tim@