Recategorize seeder connections as not manual
Recategorize seeder connections as not manual

Summary:
After the seeder is started, there is no user input.  As such, the
connections the seeder makes should not be considered manual.

Test Plan:
  ninja
  ./bitcoin-seeder -host=localhost -ns=blah.bitframe.org -port=8888 -mbox=info@bitframe.org --testnet --wipeban --wipeignore
There should be no behavioral changes.

Reviewers: O1 Bitcoin ABC, #bitcoin_abc, deadalnix

Reviewed By: O1 Bitcoin ABC, #bitcoin_abc, deadalnix

Differential Revision: https://reviews.bitcoinabc.org/D6176

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