Add `network.invalid_services` configuration setting.

[Eric Voskuil]

[network]
# The services exposed by network connections, defaults to 1 (full node).
services = 1
# The advertised services that cause a peer to be dropped, defaults to 0 (none).
invalid_services = 0
...

Rationale: bitcoin/bitcoin#10982

[Eric Voskuil]

This is implemented for the pending v3.3.0 release.