xinetd: change download location

xinetd.org is down, change to github instead.
Hash can not be used, the tarball is generated.

Signed-off-by: Karoly Kasza <kaszak@gmail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

package/xinetd/xinetd.mk

@@ -4,8 +4,8 @@
 #
 ################################################################################
 
-XINETD_VERSION = 2.3.15
-XINETD_SITE = http://www.xinetd.org
+XINETD_VERSION = xinetd-2-3-15
+XINETD_SITE = $(call github,xinetd-org,xinetd,$(XINETD_VERSION))
 XINETD_LICENSE = xinetd license
 XINETD_LICENSE_FILES = COPYRIGHT