Log receipt of deprecated or unsupported requests

[gavin-norman-sociomantic]

WIP implementation. Needs testing in a node. Blocked on having a neo node compatible with swarm v5.x.x.

[gavin-norman-sociomantic]

Tested (in dmqnode), updated, and unblocked.

[gavin-norman-sociomantic]

Updated with fixed stats log tests.

[gavin-norman-sociomantic]

Updated:

• Addressed Nemanja's points.
• Refactored the flag into recent_activity, which has a more intuitive function (as opposed to being a flag that just says "method X did Y").

[nemanja-boric-sociomantic]

Small notes about release notes and a small typo, but LGTM overall.

[gavin-norman-sociomantic]

Updated and rebased.