net.dns: (for some reason this commit didn't pull over from 0.5) Remove hard-coded 4.2.2.1 from dns.lua

Merge with 0.5

net.dns: Accidentally committed a hard-coded 4.2.2.1 nameserver

core.s2smanager: Don't recurse CNAMEs infinitely :)

net.server: Fix traceback when closing connections with buffered data get closed during send

Merge with 0.5

Tagging 0.5.2

Merge with 0.5

mod_vcard: Handle vcard requests from local components.

Merge with 0.5

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