whois: Update to version 5.5.18

whois: Update to version 5.5.18

- Update from version 5.5.17 to 5.5.18
- Update of rootfile not required.
- Changelog
    5.5.18
	  * Updated the .ga TLD server. (Closes: #1037288)
	  * Added new recovered IPv4 allocations.
	  * Removed the delegation of 43.0.0.0/8 to JPNIC.
	  * Removed 12 new gTLDs which are no longer active.
	  * Improved the man page source, courtesy of Bjarni Ingi Gislason.
            (Closes: #1040613)
	  * Added the .edu.za SLD server.
	  * Updated the .alt.za SLD server.
	  * Added the -ru and -su NIC handles servers.

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