Version 4.62
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1. The ${readsocket expansion item now supports Internet domain sockets as well
   as Unix domain sockets. If the first argument begins "inet:", it must be of
   the form "inet:host:port". The port is mandatory; it may be a number or the
   name of a TCP port in /etc/services. The host may be a name, or it may be an
   IP address. An ip address may optionally be enclosed in square brackets.
   This is best for IPv6 addresses. For example:

     ${readsocket{inet:[::1]:1234}{<request data>}...

   Only a single host name may be given, but if looking it up yield more than
   one IP address, they are each tried in turn until a connection is made. Once
   a connection has been made, the behaviour is as for ${readsocket with a Unix
   domain socket.

2. If a redirect router sets up file or pipe deliveries for more than one
   incoming address, and the relevant transport has batch_max set greater than
   one, a batch delivery now occurs.

3. The appendfile transport has a new option called maildirfolder_create_regex.
   Its value is a regular expression. For a maildir delivery, this is matched
   against the maildir directory; if it matches, Exim ensures that a
   maildirfolder file is created alongside the new, cur, and tmp directories.

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