kvdb: add postgres

kvdb/postgres/config.go

@@ -0,0 +1,9 @@
+package postgres
+
+import "time"
+
+// Config holds postgres configuration data.
+type Config struct {
+	Dsn     string        `long:"dsn" description:"Database connection string."`
+	Timeout time.Duration `long:"timeout" description:"Database connection timeout. Set to zero to disable."`
+}