parameter value overflow in main.cf

Hi

I noticed that postfix doesn't say a word if value of integer parameter in
main.cf is too big. The int variable is silently overflowed.
Additionaly - postconf shows oryginal value (the way it's saved in config file).

I noticed the problem when I set mailbox_size_limit to high, but it
can be tested with any int variable:

Eg.
4294967295 = 0xffffffff = -1

I set
debug_peer_level = 4294967297
and reloaded postifx, after that the real value of
the variable is 1 but postconf shows it's 4294967297.

When I set
debug_peer_level = 4294967295
I got message
Feb 3 13:25:39 smb postfix[7817]: fatal: invalid debug_peer_level: -1 (min 1)
(postconf is reporting oryginal value)

It seems that
static int convert_mail_conf_int(const char *name, int *intval)
should be rewritten to check for overflows (possibly use
strtoll instead of sscanf etc.)

I'm not familiar with postfix development rules but I could make a patch.
Where should it be sent to for acceptance?

regards
--
Marcin Gryszkalis
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