tests/stub_conn: add empty notes object

avoids plugins having to set it up for themselves dozens of times
connection: append A-R results after data_post_respond

adds late additions, like DKIM validation
dnsbl: use boolean config, use callback to refresh, make tests pass when extra DNSBLs are configured
configfile: added loginfo when file change detected
Merge pull request #577 from msimerson/config

configfile: added loginfo when file change detected
Merge pull request #576 from msimerson/tests

tests/stub_conn: add empty notes object
Merge pull request #575 from msimerson/dnsbl

dnsbl: use boolean config, use callback to refresh, make tests pass when...
Merge pull request #574 from msimerson/connection

Connection
Protect against transaction going away

Closes #317
Merge branch 'master' of github.com:baudehlo/Haraka
Add parameters to bounce errors

Fixes #552
Applied code from #477

Fixes #477
Add recipients to bounce message.

Fixes #568