Bug Fixes server: prevent to output Transfer-encoding when server upgrade (#1465) (eb105679) Features client: introduce lower-level Connection API (1207c2b6, closes #1449) header: add text() and text_utf8() constructors to ContentType (45cf8c57) server: add service property to server::conn::Parts (bf7c0bbf, closes #1471) add upgrade support to lower-level Connection API (#1459) (d58aa732, closes #1323)
