package/mongodb: security bump to version 4.2.8

Fix the following security issues:
- SERVER-45514 [FLE] Reject document validators with encryption-related
  keywords if the validationAction is “warn”
- SERVER-48039 Unrecognized option: net.ssl.clusterCertificateSelector
  in MongoDB v4.2
- SERVER-45803 mongodecrypt needs a ServiceContext
- SERVER-46834 Use monotonic time in UserCacheInvalidator
- SERVER-47113 LDAP connection pool acquisition state should own host
  list

https://docs.mongodb.com/manual/release-notes/4.2

Also:
- Update indentation in hash file (two spaces)
- Tweak version to be "compliant" with https://release-monitoring.org
- Use official tarball

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/mongodb/mongodb.hash

@@ -1,4 +1,4 @@
 # Locally computed:
-sha256 033839fe43adb13351f9e0ef361d4731d7e917b2d7ad12f09df73e6e9c8bf6db  mongodb-r4.2.4.tar.gz
-sha256 cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30  APACHE-2.0.txt
-sha256 09d99ca61eb07873d5334077acba22c33e7f7d0a9fa08c92734e0ac8430d6e27  LICENSE-Community.txt
+sha256  e8880277e3910afd82c71ed61861d518f2040cbc062e00a26d53a3224284db8f  mongodb-src-r4.2.8.tar.gz
+sha256  cfc7749b96f63bd31c3c42b5c471bf756814053e847c10f3eb003417bc523d30  APACHE-2.0.txt
+sha256  09d99ca61eb07873d5334077acba22c33e7f7d0a9fa08c92734e0ac8430d6e27  LICENSE-Community.txt

package/mongodb/mongodb.mk

@@ -4,9 +4,9 @@
 #
 ################################################################################
 
-MONGODB_VERSION_BASE = 4.2.4
-MONGODB_VERSION = r$(MONGODB_VERSION_BASE)
-MONGODB_SITE = $(call github,mongodb,mongo,$(MONGODB_VERSION))
+MONGODB_VERSION = 4.2.8
+MONGODB_SITE = https://fastdl.mongodb.org/src
+MONGODB_SOURCE = mongodb-src-r$(MONGODB_VERSION).tar.gz
 
 MONGODB_LICENSE = Apache-2.0 (drivers), SSPL (database)
 MONGODB_LICENSE_FILES = APACHE-2.0.txt LICENSE-Community.txt
@@ -41,7 +41,7 @@ MONGODB_SCONS_OPTS = \
 	--use-system-zlib
 
 # need to pass mongo version when not building from git repo
-MONGODB_SCONS_OPTS += MONGO_VERSION=$(MONGODB_VERSION_BASE)-
+MONGODB_SCONS_OPTS += MONGO_VERSION=$(MONGODB_VERSION)-
 
 # WiredTiger database storage engine only supported on 64 bits
 ifeq ($(BR2_ARCH_IS_64),y)