ssl: Servers may include an empty SNI-extension
ssl: Prepare for release
ssh: Fix option user_interaction to work as expected

When password authentication is implemented with ssh
keyboard-interactive method and the password is already supplied, so
that we do not need to query the user, connections should
succeed even though the user_interaction option is set to false.
ssh: Add option sftp_vsn
ssh: Prepare for release
Merge branch 'ia/17-patch/ssl/empty-sni-from-server/OTP-12198' into maint-17

* ia/17-patch/ssl/empty-sni-from-server/OTP-12198:
  ssl: Prepare for release
  ssl: Servers may include an empty SNI-extension
Merge branch 'ia/patch-17/ssh/user-interaction/OTP-11329/sftp-version/OTP-12227' into maint-17

* ia/patch-17/ssh/user-interaction/OTP-11329/sftp-version/OTP-12227:
  ssh: Prepare for release
  ssh: Add option sftp_vsn
  ssh: Fix option user_interaction to work as expected
Update release notes
Updated OTP version
Merge branch 'maint-17' into maint

Conflicts:
	OTP_VERSION
[const] erts_thr_fatal_error now const
[const] beam_bp const
[const] beam/atom
[const] beam_bif_load
[const] beam_debug + some lookup functions const'ized
[const] beam_emu, some getters and print functions and C main/2
[const] beam_load - constness affected erl_init, erl_alloc, erl_mtrace, some global and sys and utils
[const] beam_load (finished), md5 library, some init and get config calls const'ized
[const] const formats for various error and printf functions
[const] binary