Fix: fixed remaining event handlers

plugins/analysis/webinterface/httpserver/index.go

plugins/autopeering/protocol/error_handler.go

plugins/autopeering/protocol/incoming_drop_processor.go

plugins/autopeering/protocol/incoming_ping_processor.go

plugins/autopeering/protocol/incoming_request_processor.go

plugins/autopeering/protocol/incoming_response_processor.go

plugins/autopeering/server/tcp/events.go

plugins/autopeering/server/tcp/server.go

plugins/autopeering/server/tcp/types.go

plugins/autopeering/server/udp/events.go

plugins/autopeering/server/udp/server.go

plugins/autopeering/server/udp/types.go