svn path=/branches/BRANCH_6-3/; revision=4806
* The MX and host alias DNS lookups that fetchmail performs in multidrop mode
are obsolete, deprecated and may be removed from a future fetchmail version.
They have never supported IPv6 (including IPv6-mapped IPv4) anyhow.
+ Non-DNS based alias keywords such as "aka" will remain in fetchmail.
* The monitor and interface options may be removed from a future fetchmail
version as they are not sufficiently portable.
* POP2 is obsolete.