[dev-db/mongodb] for 6 migrate socket to /run and change logdir creation to tmpfiles

dev-db/mongodb/files/mongodb.conf-r4

@@ -0,0 +1,36 @@
+# !! IMPORTANT !!
+#
+# This file uses the YAML format as described in the documentation:
+#   http://docs.mongodb.org/manual/reference/configuration-options/
+
+storage:
+    dbPath: "/var/lib/mongodb"
+    #engine: wiredTiger
+
+systemLog:
+    destination: file
+    path: "/var/log/mongodb/mongodb.log"
+    quiet: true
+    logAppend: true
+
+net:
+    port: 27017
+    bindIp: 127.0.0.1
+    unixDomainSocket:
+        pathPrefix: "/run/mongodb"
+    #ssl:
+    #    mode: disabled
+
+#security:
+    #keyFile:
+    #clusterAuthMode:
+
+#replication:
+    #replSetName:
+
+# Specifies one of the MongoDB parameters described here:
+#   http://docs.mongodb.org/manual/reference/parameters/
+#
+# You can specify multiple setParameter fields such as:
+#   setParameter: {enableTestCommands: 1}
+#setParameter: