Add NEWS entry for issue #19834.
Add NEWS entry for issue #19834: merge with 3.3.
asyncio: document network functions, and stream reader/writer
asyncio: more documentation
asyncio doc: group transport method by classes

Declare classes because they are mentionned in documentation of other functions
asyncio: sort some methods
Fixed regex match representation in an example.
Fixed formatting (was parsed as description list).
Issue #19782: imaplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
merge
Issue #19784: poplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
Issue #19783: nntplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
Issue #19785: smtplib now supports SSLContext.check_hostname and server name
indication for TLS/SSL connections.
add check_hostname arg to ssl._create_stdlib_context()
Issue #19852: move Path._raw_open() around, as it is now a private method.
Patch by Vajrasky Kok.
asyncio doc

* complete create_connection() prototype
* link to Server
* document get_extra_info() keys
asyncio: document wait() function
asyncio doc: reorder sections
asyncio doc: change level of titles

Remove also a duplicated Protocols section!
Split asyncio documentation into subfiles