package/samba4: security bump to version 4.9.17

Fixes the following security vulnerabilities:

- CVE-2019-14861: Samba AD DC zone-named record Denial of Service in DNS
                  management server (dnsserver).
- CVE-2019-14870: DelegationNotAllowed not being enforced in protocol transition
                  on Samba AD DC.

https://www.samba.org/samba/history/samba-4.9.17.html

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/samba4/samba4.hash

@@ -1,4 +1,4 @@
 # Locally calculated after checking pgp signature
-# https://download.samba.org/pub/samba/stable/samba-4.9.15.tar.asc
-sha256 377102b80b97941bf0d131b828cae8415190e5bdd2928c2e2c954e29f1904496  samba-4.9.15.tar.gz
+# https://download.samba.org/pub/samba/stable/samba-4.9.17.tar.asc
+sha256 42467af2efab4793c7988561644a84de4000e96a87ce8239362c6d10abace295  samba-4.9.17.tar.gz
 sha256 8ceb4b9ee5adedde47b31e975c1d90c73ad27b6b165a1dcd80c7c545eb65b903  COPYING

package/samba4/samba4.mk

@@ -4,7 +4,7 @@
 #
 ################################################################################
 
-SAMBA4_VERSION = 4.9.15
+SAMBA4_VERSION = 4.9.17
 SAMBA4_SITE = https://download.samba.org/pub/samba/stable
 SAMBA4_SOURCE = samba-$(SAMBA4_VERSION).tar.gz
 SAMBA4_INSTALL_STAGING = YES