libremail+tools: Add mailbox_create() function

It is best to prefer mailbox_create() rather than try_mkdir() directly
as we'll be able to encapslate mailbox creation logic within it.

Signed-off-by: Chloe M. <chloe@mirocom.org>

tools/mailutil/core/mailutil.c

@@ -10,6 +10,7 @@
 #include <dirent.h>
 #include "libremail/file.h"
 #include "libremail/common.h"
+#include "libremail/mailbox.h"
 
 /* Maximum command components */
 #define CMD_MAX_CNP 6
@@ -120,7 +121,7 @@ cmd_mailbox_create(const char *cmdlist[CMD_MAX_CNP], size_t count)
         MAILBOX_PREFIX, cmdlist[2]);
 
     /* Create the mailbox */
-    if (try_mkdir(pathbuf, DEFAULT_MAILBOX_MODE) < 0) {
+    if (mailbox_create(pathbuf, DEFAULT_MAILBOX_MODE) < 0) {
         printf("fatal: failed to create mailbox\n");
         perror("try_mkdir");
         return -1;