[Dovecot] stats plugin + UID command continuation

[Mike Abbott]

When using the stats plugin for dovecot-2.0, UID commands that "continue" cause 
infinite recursion and crash.  For example, "A22 UID FETCH 151 BODY[]" when the 
body is 3MB or so always crashes.  For smaller messages, this command logs the 
duration twice.  Here is a patch to fix it:

--- stats-plugin.c.orig 2010-10-26 20:18:13.000000000 -0500
+++ stats-plugin.c      2010-10-26 20:19:10.000000000 -0500
@@ -197,6 +197,9 @@
 
        commands = array_get_modifiable(&imap_commands, &count);
        for (i = 0; i < count; i++) {
+               if (strcasecmp(commands[i].name, "UID") == 0)
+                       continue;
+
                hash_table_insert(orig_cmds, (char *)commands[i].name,
                                  commands[i].func);
                commands[i].func = stats_command;