mail/p5-Email-Address is deprecated

[dvl]

Summary

mail/p5-Email-Address-XS is a plug-in replacement, just change uses
to mail/p5-Email-Address-XS

Test Plan

This diff is just for the port, but I suspect the upstream code
also needs to be changed. Other ports will also require changes. This is
just a starting point.

[dvl]

I've just installed this patch on a development version of FreshPorts.

[dvl]

See also https://github.com/rjbs/Email-MessageID/issues/3

[dvl]

Overtaken by events. See https://svnweb.freebsd.org/ports?view=revision&revision=474806 which removes this dependency.