[patches] avoid unless exit()

[Gonéri Le Bouder]

Hi,

On AIX 5.3 (20CPU/96GB), the cost of process restart is very expensive. These
patches improve performance by avoiding unnecessary exit()
call.

avoid_shut_down_if_no_input.patch:
 Everytime our Alteon opens a socket for the health check, it kills a
 process. Just because it don't send any data. The problem can be
 easily reproduce with a telnet connection.

cyrus-imapd-2.3.16-ignore_ECONNABORTED.patch:
 If the connection is closed by the client, the process gets an ECONNABORTED
 error (Connection aborted POSIX.1). This new patch catches this error.

Best regards,

-- 
     Gonéri Le Bouder
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