chasquid-util: Create the domain directory when adding a user

When adding a user, chasquid-util should create the domain directory if
it doesn't exist, but currently doesn't do that.

This patch fixes this by adding the missing os.MkdirAll call.

Thanks to Martin Ferrari for the bug report!

cmd/chasquid-util/chasquid-util.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io/ioutil"
 	"os"
+	"path/filepath"
 	"syscall"
 
 	"bytes"
@@ -86,6 +87,7 @@ func userDBFromArgs(create bool) (string, string, *userdb.DB) {
 	if err != nil {
 		if create && os.IsNotExist(err) {
 			fmt.Println("Creating database")
+			os.MkdirAll(filepath.Dir(userDBForDomain(domain)), 0755)
 		} else {
 			Fatalf("Error loading database: %v", err)
 		}