Renamed to basic_fields::set (API Change):

* `replace` is renamed to `set`

Actions Required:

* Rename calls to `basic_fields::replace` to `basic_fields::set`

test/http/doc_examples.cpp

@@ -124,7 +124,7 @@ public:
             {
                 ec = {};
                 h.erase("Content-Length");
-                h.replace("Transfer-Encoding", "chunked");
+                h.set("Transfer-Encoding", "chunked");
             });
         BEAST_EXPECTS(! ec, ec.message());
         BEAST_EXPECT(equal_body<true>(