Exim 4.72 release

Exim release 4.72 is now available from the primary ftp site:
  * ftp://ftp.exim.org/pub/exim/exim4/exim-4.72.tar.gz
  * ftp://ftp.exim.org/pub/exim/exim4/exim-4.72.tar.bz2
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The changes involved are:-

 1. TWO SECURITY FIXES: one relating to mail-spools which are globally
    writable, the other to locking of MBX folders (not mbox).
    These have CVE identifiers CVE-2010-2023 and CVE-2010-2024

 2. MySQL stored procedures are now supported.

 3. The dkim_domain transport option is now a list, not a single 
    string, and messages will be signed for each element in the
    list (discarding duplicates).

 4. The 4.70 release unexpectedly changed the behaviour of dnsdb TXT 
    lookups in the presence of multiple character strings within
    the RR. Prior to 4.70, only the first string would be returned.
    The dnsdb lookup now, by default, preserves the pre-4.70
    semantics, but also now takes an extended output separator
    specification. The separator can be followed by a semicolon, to
    concatenate the individual text strings together with no join
    character, or by a comma and a second separator character, in
    which case the text strings within a TXT record are joined on
    that second character. Administrators are reminded that DNS
    provides no ordering guarantees between multiple records in an
    RRset. For example: