whois: Update to version 5.6.4

whois: Update to version 5.6.4

- Update from version 5.6.1 to 5.6.4
- Update of rootfile not required
- Changelog
    5.6.4
	* Updated the .cm and .to TLD servers.
    5.6.3
	* Added the .sr and .мон (.xn--l1acc, Mongolia) TLD servers.
	* Use readpassphrase(3) on OpenBSD and FreeBSD.
    5.6.2
	* Updated the .post and .in (and related IDN TLDs) TLD servers.
	* Removed 1 new gTLDs which is no longer active.
	* Build-Depend on libcrypt-dev. (Closes: #1106977)

Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>