Update mongo

Changes:

- https://github.com/docker-library/mongo/commit/6e49bac: Merge pull request https://github.com/docker-library/mongo/pull/447 from infosiftr/ini-style-config
- https://github.com/docker-library/mongo/commit/c9d4281: Detect/ignore the old INI-style configuration

library/mongo

@@ -8,7 +8,7 @@ Tags: 3.6.21-xenial, 3.6-xenial, 3-xenial
 SharedTags: 3.6.21, 3.6, 3
 # see http://repo.mongodb.org/apt/ubuntu/dists/xenial/mongodb-org/3.6/multiverse/
 Architectures: amd64, arm64v8
-GitCommit: fb982041304c66b108192458aba89b33b5bebc60
+GitCommit: c9d4281a620f1e1ee95aaa084c5b60fc68ba65b9
 Directory: 3.6
 
 Tags: 3.6.21-windowsservercore-1809, 3.6-windowsservercore-1809, 3-windowsservercore-1809
@@ -29,7 +29,7 @@ Tags: 4.0.21-xenial, 4.0-xenial
 SharedTags: 4.0.21, 4.0
 # see http://repo.mongodb.org/apt/ubuntu/dists/xenial/mongodb-org/4.0/multiverse/
 Architectures: amd64, arm64v8
-GitCommit: fb982041304c66b108192458aba89b33b5bebc60
+GitCommit: c9d4281a620f1e1ee95aaa084c5b60fc68ba65b9
 Directory: 4.0
 
 Tags: 4.0.21-windowsservercore-1809, 4.0-windowsservercore-1809
@@ -50,7 +50,7 @@ Tags: 4.2.11-bionic, 4.2-bionic
 SharedTags: 4.2.11, 4.2
 # see http://repo.mongodb.org/apt/ubuntu/dists/bionic/mongodb-org/4.2/multiverse/
 Architectures: amd64, arm64v8
-GitCommit: fb982041304c66b108192458aba89b33b5bebc60
+GitCommit: c9d4281a620f1e1ee95aaa084c5b60fc68ba65b9
 Directory: 4.2
 
 Tags: 4.2.11-windowsservercore-1809, 4.2-windowsservercore-1809
@@ -71,7 +71,7 @@ Tags: 4.4.2-bionic, 4.4-bionic, 4-bionic, bionic
 SharedTags: 4.4.2, 4.4, 4, latest
 # see http://repo.mongodb.org/apt/ubuntu/dists/bionic/mongodb-org/4.4/multiverse/
 Architectures: amd64, arm64v8, s390x
-GitCommit: fb982041304c66b108192458aba89b33b5bebc60
+GitCommit: c9d4281a620f1e1ee95aaa084c5b60fc68ba65b9
 Directory: 4.4
 
 Tags: 4.4.2-windowsservercore-1809, 4.4-windowsservercore-1809, 4-windowsservercore-1809, windowsservercore-1809