Fix memory leaks in filter and filter_iconv code.

* mailbox/filter.c (filter_destroy): Destroy the underlying
stream, unless flag is given.
(mu_filter_create): Treat last argument as stream flags.
* mailbox/filter_iconv.c (_icvt_destroy): Free the icvt_stream
structure.

* examples/mimetest.c (message_display_parts): Pass
MU_STREAM_NO_CLOSE to the invocation of mu_filter_create.
* mail/decode.c (display_submessage): Likewise.
* mailbox/attachment.c (mu_message_save_attachment): Likewise.
* mh/mh_list.c (eval_body): Likewise.
* mh/mhn.c (mhn_message_size, show_internal): Likewise.
(finish_text_msg): Likewise; call mu_stream_destroy

* imap4d/preauth.c (decode64_buf): remove unnecessary
call to mu_stream_destroy.
* libmu_auth/ldap.c (chk_md5, chk_smd5)
(chk_sha, chk_ssha): Likewise.

* mailbox/mutil.c: Fix indentation.

@@ -251,7 +251,10 @@ message_display_parts (mu_message_t msg, int indent)
           printf ("%*.*sBegin\n", indent, indent, "");
           mu_message_get_body (part, &body);
           mu_body_get_stream (body, &str);
-          mu_filter_create (&str, str, encoding, 0, 0);
+          /* Make sure the original body stream is not closed when
+             str gets destroyed */
+          mu_filter_create (&str, str, encoding, MU_FILTER_DECODE,
+			    MU_STREAM_READ | MU_STREAM_NO_CLOSE);
           offset = 0;
           while (mu_stream_readline (str, buf, sizeof (buf),
 				     offset, &nbytes) == 0 && nbytes)

@@ -217,7 +217,6 @@ decode64_buf (const char *name, unsigned char **pbuf, size_t *psize)
   mu_stream_sequential_write (str, name, namelen);
   mu_stream_read (flt, (char*) buf, sizeof buf, 0, &size);
   mu_stream_destroy (&flt, NULL);
-  mu_stream_destroy (&str, NULL);
   *pbuf = malloc (size);
   if (!*pbuf)
     return 1;

@@ -602,7 +602,6 @@ chk_md5 (const char *db_pass, const char *pass)
 
   mu_stream_read (flt, (char*) d1, sizeof d1, 0, NULL);
   mu_stream_destroy (&flt, NULL);
-  mu_stream_destroy (&str, NULL);
   
   return memcmp (md5digest, d1, sizeof md5digest) == 0 ?
                   0 : MU_ERR_AUTH_FAILURE;
@@ -629,13 +628,11 @@ chk_smd5 (const char *db_pass, const char *pass)
   if (!d1)
     {
       mu_stream_destroy (&flt, NULL);
-      mu_stream_destroy (&str, NULL);
       return ENOMEM;
     }
   
   mu_stream_read (flt, (char*) d1, size, 0, &size);
   mu_stream_destroy (&flt, NULL);
-  mu_stream_destroy (&str, NULL);
 
   if (size <= 16)
     {
@@ -674,7 +671,6 @@ chk_sha (const char *db_pass, const char *pass)
 
   mu_stream_read (flt, (char*) d1, sizeof d1, 0, NULL);
   mu_stream_destroy (&flt, NULL);
-  mu_stream_destroy (&str, NULL);
   
   return memcmp (sha1digest, d1, sizeof sha1digest) == 0 ?
                   0 : MU_ERR_AUTH_FAILURE;
@@ -701,7 +697,6 @@ chk_ssha (const char *db_pass, const char *pass)
   if (!d1)
     {
       mu_stream_destroy (&flt, NULL);
-      mu_stream_destroy (&str, NULL);
       return ENOMEM;
     }
   

@@ -258,7 +258,8 @@ display_submessage (struct mime_descend_closure *closure, void *data)
 
       /* Can we decode.  */
       if (mu_filter_create(&d_stream, b_stream, closure->encoding,
-			   MU_FILTER_DECODE, MU_STREAM_READ) == 0)
+			   MU_FILTER_DECODE, 
+			   MU_STREAM_READ|MU_STREAM_NO_CLOSE) == 0)
 	stream = d_stream;
       else
 	stream = b_stream;

@@ -313,7 +313,8 @@ mu_message_save_attachment (mu_message_t msg, const char *filename,
 		content_encoding = "7bit";
 	      ret =
 		mu_filter_create (&info->stream, istream, content_encoding,
-				  MU_FILTER_DECODE, MU_STREAM_READ);
+				  MU_FILTER_DECODE,
+				  MU_STREAM_READ | MU_STREAM_NO_CLOSE);
 	      free (content_encoding_mem);
 	    }
 	}

@@ -46,6 +46,8 @@ static void
 filter_destroy (mu_stream_t stream)
 {
   mu_filter_t filter = mu_stream_get_owner (stream);
+  if (!(stream->flags & MU_STREAM_NO_CLOSE))
+    mu_stream_destroy (&filter->stream, mu_stream_get_owner (filter->stream));
   if (filter->_destroy)
     filter->_destroy (filter);
   if (filter->property)
@@ -165,7 +167,7 @@ mu_filter_get_list (mu_list_t *plist)
 
 int
 mu_filter_create (mu_stream_t *pstream, mu_stream_t stream, const char *name,
-		  int type, int direction)
+		  int type, int flags)
 {
   mu_iterator_t iterator = NULL;
   mu_filter_record_t filter_record = NULL;
@@ -204,14 +206,12 @@ mu_filter_create (mu_stream_t *pstream, mu_stream_t stream, const char *name,
 
   if (found)
     {
-      int flags = 0;
       mu_filter_t filter;
 
       filter = calloc (1, sizeof (*filter));
       if (filter == NULL)
 	return ENOMEM;
 
-      mu_stream_get_flags (stream, &flags);
       status = mu_stream_create (pstream, flags | MU_STREAM_NO_CHECK, filter);
       if (status != 0)
 	{
@@ -221,7 +221,11 @@ mu_filter_create (mu_stream_t *pstream, mu_stream_t stream, const char *name,
 
       filter->stream = stream;
       filter->filter_stream = *pstream;
-      filter->direction = (direction == 0) ? MU_STREAM_READ : direction;
+      filter->direction = (flags == 0) ? MU_STREAM_READ
+	                      : (flags
+				 & (MU_STREAM_READ |
+				    MU_STREAM_WRITE |
+				    MU_STREAM_RDWR));
       filter->type = type;
 
       status = mu_property_create (&(filter->property), filter);
@@ -249,8 +253,8 @@ mu_filter_create (mu_stream_t *pstream, mu_stream_t stream, const char *name,
 	    }
         }
 
-      mu_stream_set_open (*pstream, filter_open, filter );
-      mu_stream_set_close (*pstream, filter_close, filter );
+      mu_stream_set_open (*pstream, filter_open, filter);
+      mu_stream_set_close (*pstream, filter_close, filter);
       mu_stream_set_read (*pstream, filter_read, filter);
       mu_stream_set_readline (*pstream, filter_readline, filter);
       mu_stream_set_write (*pstream, filter_write, filter);

@@ -114,6 +114,7 @@ _icvt_destroy (mu_stream_t stream)
   s->buf = NULL;
   if (s->cd != (iconv_t) -1)
     iconv_close (s->cd);
+  free (s);
 }
 
 static int _icvt_read (mu_stream_t stream, char *optr, size_t osize,

@@ -1329,8 +1329,8 @@ mu_decode_filter (mu_stream_t *pfilter, mu_stream_t input,
     {
       mu_stream_t cvt;
       status = mu_filter_iconv_create (&cvt, filter, fromcode, tocode,
-				    MU_STREAM_NO_CLOSE,
-				    mu_default_fallback_mode);
+				       MU_STREAM_NO_CLOSE,
+				       mu_default_fallback_mode);
       if (status == 0)
 	{
 	  if (mu_stream_open (cvt))

@@ -699,7 +699,8 @@ eval_body (struct eval_env *env)
       if (encoding)
 	{
 	  int rc = mu_filter_create(&dstr, input, encoding,
-				 MU_FILTER_DECODE, MU_STREAM_READ);
+				    MU_FILTER_DECODE, 
+				    MU_STREAM_READ | MU_STREAM_NO_CLOSE);
 	  if (rc == 0)
 	    input = dstr;
 	  free (encoding);

@@ -1122,8 +1122,9 @@ mhn_message_size (mu_message_t msg, size_t *psize)
 	  mu_message_get_header (msg, &hdr);
 	  _get_content_encoding (hdr, &encoding);
 
-	  rc = mu_filter_create(&dstr, bstr, encoding,
-				MU_FILTER_DECODE, MU_STREAM_READ);
+	  rc = mu_filter_create (&dstr, bstr, encoding,
+			 	 MU_FILTER_DECODE, 
+				 MU_STREAM_READ | MU_STREAM_NO_CLOSE);
 	  free (encoding);
 	  if (rc == 0)
 	    {
@@ -1272,8 +1273,8 @@ show_internal (mu_message_t msg, msg_part_t part, char *encoding, mu_stream_t ou
       return 0;
     }
   mu_body_get_stream (body, &bstr);
-  rc = mu_filter_create(&dstr, bstr, encoding,
-		     MU_FILTER_DECODE, MU_STREAM_READ);
+  rc = mu_filter_create (&dstr, bstr, encoding,
+		         MU_FILTER_DECODE, MU_STREAM_READ | MU_STREAM_NO_CLOSE);
   if (rc == 0)
     bstr = dstr;
   cat_message (out, bstr);
@@ -2052,10 +2053,12 @@ finish_text_msg (struct compose_env *env, mu_message_t *msg, int ascii)
       mu_message_get_body (*msg, &body);
       mu_body_get_stream (body, &input);
       rc = mu_filter_create (&fstr, input, "quoted-printable",
-			     MU_FILTER_ENCODE, MU_STREAM_READ);
+			     MU_FILTER_ENCODE, 
+			     MU_STREAM_READ | MU_STREAM_NO_CLOSE);
       if (rc == 0)
 	{
 	  cat_message (output, fstr);
+	  mu_stream_destroy (&fstr, NULL);
 	  mu_message_unref (*msg);
 	  *msg = newmsg;
 	}