Log Message:
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Revert "eos: Remove some dead code."
This reverts commit 01631d5a0fd7f7ce1487358a31a0ffbaa1158d97.
I don't know what I was thinking that day. How are we going
to detect hostname changes without this code? *facepalm*
Sure, it looks like this function isn't called from anywhere,
but it's called by EOS SDK because it's a method of eossdk.SystemHandler
that we override.