Bugfixes.

* examples/echosrv.c: Fix typo.
* libmailutils/sockaddr/url.c: Likewise.
* mh/mhn.c: Likewise.
* mh/folder.c (roll_back): Fix conditional.
* THANKS: Update.

@@ -21,6 +21,7 @@ Jordi Mallach        <jordi@sindominio.net>
 Kidong Lee           <briankdlee@yahoo.com>
 Kostas Zorbadelos    <kzorba@otenet.gr>
 Matthew Whitworth    <matthew@okcomputer.org>
+maks                 <maksqwe1@ukr.net>
 Neil R. Ormos        <ormos@ormos.org>
 Olivier Bornet       <Olivier.Bornet@smartdata.ch>
 Robby Villegas       <robby.villegas@gmail.com>

@@ -140,7 +140,7 @@ create_server (char *arg)
       exit (1);
     }
 
-  memset (&hints, sizeof(hints), 0);
+  memset (&hints, 0, sizeof(hints));
   hints.flags = MU_AH_PASSIVE;
   hints.socktype = SOCK_STREAM;
   hints.protocol = IPPROTO_TCP;

@@ -62,7 +62,7 @@ mu_sockaddr_from_url (struct mu_sockaddr **retval, mu_url_t url,
     memcpy (&hints, mh, sizeof (hints));
   else
     {
-      memset (&hints, sizeof(hints), 0);
+      memset (&hints, 0, sizeof(hints));
       hints.family = AF_UNSPEC;
       hints.socktype = SOCK_STREAM;
       hints.protocol = IPPROTO_TCP;

@@ -720,9 +720,9 @@ roll_back (const char *folder_name, struct pack_tab *pack_tab, size_t i)
   if (i == 0)
     return;
   
-  start = i - 1;
+  start = --i;
   mu_error (_("rolling back changes..."));
-  while (--i >= 0)
+  do
     if (pack_rename (pack_tab + i, 1))
       {
 	mu_error (_("CRITICAL ERROR: Folder `%s' left in an inconsistent state, because an error\n"
@@ -736,6 +736,7 @@ roll_back (const char *folder_name, struct pack_tab *pack_tab, size_t i)
 	mu_error (_("You will have to fix it manually."));
 	exit (1);
       }
+  while (i-- > 0);
   mu_error (_("folder `%s' restored successfully"), folder_name);
 }
 

@@ -2808,7 +2808,7 @@ mhn_header (mu_message_t msg, mu_message_t omsg)
 		mu_message_get_part (omsg, 1, &part);
 	      else
 		part = omsg;
-	      if (part);
+	      if (part)
 		{
 		  mu_header_t parthdr = NULL;
 		  char *typestr, *typeargs;