Use CNAME for aliases
Use CNAME rather than A for aliases of hda.
The way the aliases table is set up this is not so easy, adding a third column would be one way, pulling hda and router from settings table and getting them out of aliases table might be another.
For MOST applications, multiple A records work as well as CNAME. Some applications, like sendmail and postfix do NOT behave as expected when multiple A records are used instead of CNAME.
Note DO NOT have MX reference a CNAME it will always cause problems. MX records MUST always contain FQDNs defined by an A record. Currently the MX record has neither (see bug 336).
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