1.1.1

• fix(dcc_data_post): gate on missing txn, 3x
• fix(parse_dcc): gate on missing txn
• fix(dcc_data_post): idempotent next() guard so error + end can't both fire it
• refactor: resolve the dccifd connection target at config (re)load
• config: comment out the default dccifd path so host/port can be enabled
• refactor: rename hook_data_post to dcc_data_post
• split into reusable parse_dcc + handle_dcc see haraka/Haraka#3604
• test: cover parse_dcc, handle_dcc, and a dcc_data_post exchange
• test: refactored against test-fixtures 1.7.0 (#17)