[MacPorts] #62148: exit: Update to 4.94

[MacPorts]

#62148: exit: Update to 4.94
------------------------+--------------------
 Reporter:  grumpybozo  |      Owner:  (none)
     Type:  update      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:
 Keywords:  security    |       Port:  exim
------------------------+--------------------
 Current port version is 4.92.1, which is vulnerable to CVE-2019-16928 and
 CVE-2019-15846 and lacks other general bug and  security fixes (e.g.
 "taint" checking, which catches some forms of dangerous configuration.)

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Ticket URL: <https://trac.macports.org/ticket/62148>
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