Made new constructor for the Connection type public

[bmuddha]

PR Type

Fix

PR Checklist

Check your PR fulfills the following:

• Tests for the changes have been added / updated.
• Documentation comments have been added / updated.
• A changelog entry has been made for the appropriate packages.
• Format code with the latest stable rustfmt

Overview

There's a crate called awc-uds which is used to add support for Unix Domain Sockets for awc. And it needs to construct connect::connection::Connection type when implementing actix_service::Service, after this PR, it's not possible to construct Connection anymore, as all the fields and constructor are made crate private.

Changelog

• Expose actix_tls::connect::Connection::new