Bugfixes.

* mailbox/filter.c (filter_close): Do not close transport stream if
the MU_STREAM_NO_CLOSE flag is set.
* imap4d/fetch.c (fetch_io): Fix memory leak: open the filter
with MU_STREAM_NO_CLOSE flag and destroy it after use.
* include/mailutils/header.h (mu_header_set_stream): Comment out.
There is no such function, but perhaps there should be?

* libproto/mbox/folder.c (_folder_mbox_init): If there is no
explicit path in the URL, use ".".  This makes it possible to
use URLs like: mbox:file.

* mailbox/nls.c (mu_set_locale) [ENABLE_NLS]: Remove ifdef.
Setlocale must be enabled whenever possible, otherwise
we cannot relay on mu_strftime malfunctions in non-english
locales.
* mh/mh_whom.c (mh_alias_expand): Handle NULL or empty inputs.

@@ -692,7 +692,8 @@ fetch_io (mu_stream_t stream, size_t start, size_t size, size_t max)
   size_t n = 0;
   mu_off_t offset;
 
-  mu_filter_create (&rfc, stream, "rfc822", MU_FILTER_ENCODE, MU_STREAM_READ);
+  mu_filter_create (&rfc, stream, "rfc822", MU_FILTER_ENCODE,
+		    MU_STREAM_READ|MU_STREAM_NO_CHECK|MU_STREAM_NO_CLOSE);
 
   if (start == 0 && size == (size_t) -1)
     {
@@ -721,6 +722,7 @@ fetch_io (mu_stream_t stream, size_t start, size_t size, size_t max)
     }
   else if (size + 2 < size) /* Check for integer overflow */
     {
+      mu_stream_destroy (&rfc, NULL);
       return RESP_BAD;
     }
   else
@@ -751,6 +753,7 @@ fetch_io (mu_stream_t stream, size_t start, size_t size, size_t max)
 	util_send (" \"\"");
       free (buffer);
     }
+  mu_stream_destroy (&rfc, NULL);
   return RESP_OK;
 }
 

@@ -149,8 +149,9 @@ extern int mu_header_aget_field_value_unfold (mu_header_t header, size_t num,
 					      char **pvalue);
 
 extern int mu_header_get_stream (mu_header_t, mu_stream_t *);
-extern int mu_header_set_stream (mu_header_t, mu_stream_t, void *);
-
+/* FIXME: This function does not exist:
+   extern int mu_header_set_stream (mu_header_t, mu_stream_t, void *);
+*/
 extern int mu_header_size (mu_header_t, size_t *);
 extern int mu_header_lines (mu_header_t, size_t *);
 

@@ -159,11 +159,23 @@ _folder_mbox_init (mu_folder_t folder)
     return ENOMEM;
 
   status = mu_url_aget_path (folder->url, &dfolder->dirname);
+  if (status == MU_ERR_NOENT)
+    {
+      dfolder->dirname = malloc (2);
+      if (dfolder->dirname == NULL)
+	status = ENOMEM;
+      else
+	{
+	  strcpy (dfolder->dirname, ".");
+	  status = 0;
+	}
+    }
+  
   if (status)  
     {
       free (dfolder);
       folder->data = NULL;
-      return ENOMEM;
+      return status;
     }
 
   folder->_destroy = folder_mbox_destroy;

@@ -35,7 +35,7 @@ First draft: Alain Magloire.
 #endif
 
 #include <filter0.h>
-
+#include <stream0.h>
 #include <mailutils/iterator.h>
 #include <mailutils/stream.h>
 #include <mailutils/errno.h>
@@ -124,6 +124,8 @@ static int
 filter_close (mu_stream_t stream)
 {
   mu_filter_t filter = mu_stream_get_owner (stream);
+  if (stream->flags & MU_STREAM_NO_CLOSE)
+    return 0;
   return mu_stream_close (filter->stream);
 }
 

@@ -36,7 +36,7 @@ char *mu_locale_set;
 char *
 mu_set_locale (const char *locale)
 {
-#if defined HAVE_SETLOCALE && defined ENABLE_NLS
+#if defined HAVE_SETLOCALE
   return setlocale (LC_ALL, locale);
 #else
   return NULL;

@@ -59,6 +59,12 @@ mh_alias_expand (const char *str, mu_address_t *paddr, int *incl)
   mu_address_t addr;
   int status;
   
+  if (!str || !*str)
+    {
+      *paddr = NULL;
+      return 0;
+    }
+
   if (incl)
     *incl = 0;
   status = mu_address_create_hint (&addr, str, NULL, 0);