Prepare release
ssl: Setopts during renegotiation caused the renegotiation to be unsuccessful.

If calling setopts during a renegotiation the FSM state might change
during the handling of the setopts messages, this is now handled correctly.
ssl: Revert faulty header option fix

The code was changed in the belife that it made it inet compatible.
However the testing is a bit hairy as the inet option is acctualy
broken, now the tests are corrected and the header option should work
in the same broken way as inet again, preferably use the bitsyntax
instead.
Merge branch 'ia/ssl/header-bug/OTP-11230' into maint

* ia/ssl/header-bug/OTP-11230:
  ssl: Revert faulty header option fix
[inets, ssl]: make log_alert configurable as option in ssl, SSLLogLevel added as option to inets conf file
Update release notes
Merge branch 'maint-r15' into maint-r16

Conflicts:
	lib/inets/doc/src/notes.xml
	lib/inets/src/http_lib/http_transport.erl
	lib/inets/src/inets_app/inets.appup.src
	lib/inets/vsn.mk
	lib/ssl/doc/src/notes.xml
	lib/ssl/src/ssl.appup.src
	lib/ssl/src/ssl.erl
	lib/ssl/src/ssl_internal.hrl
	lib/ssl/src/tls_connection.erl
	lib/ssl/vsn.mk
Merge branch 'maint-r16' into maint
ssl: documentation regarding log_alert
ssl: Make the ssl manager name for erlang distribution over SSL/TLS
relative to the module name of the ssl_manager.

This can be beneficial when making tools that rename modules for internal
processing in the tool.