Update release notes
Updated OTP version
erts: Fix system_monitor(large_heap) for non-smp VM

No message for large_heap monitoring was ever sent on non-smp VM.
Bug introduced in R16B.
Don't allow slave nodes to survive their test case

The slave node from release_handler_SUITE:upgrade_supervisor_fail
sometimes survives its test case. Or rather, it is unexpectedly
restarted. Every now and then, on a slow machine, this confuses the
next test case since test_server:start_node might return the old node
name instead of the new. This has been corrected by using
{error_action,reboot} in release_handler_SUITE:upgrade_supervisor_fail
- to make sure the slave node is really terminated on rollback.
Skip test when needed applications are missing

On some test hosts a lot of applications are skipped from the erlang
installation in order to make test go faster.

systools_SUITE:app_start_type_relup uses a few applications which
therefore might not exist. This commit make sure the test is skipped
(instead of fail) if some of the needed applications are missing.
[reltool] Increase timetrap timeout to handle slow test machines
Fixed type spec of erlang:system_info/1
Add initial documentation framework for TypEr.
Merge branch 'sverk/monitor-large-heap-nosmp/OTP-11852' into maint-17

* sverk/monitor-large-heap-nosmp/OTP-11852:
  erts: Fix system_monitor(large_heap) for non-smp VM
Merge branch 'rickard/sys_info_spec/OTP-11859' into maint-17

* rickard/sys_info_spec/OTP-11859:
  Fixed type spec of erlang:system_info/1
Merge branch 'rickard/typer-doc/OTP-11860' into maint-17

* rickard/typer-doc/OTP-11860:
  Add initial documentation framework for TypEr.
Prepare release
Updated OTP version
Correct the name of a compiler option and fix the corresponding warnings

The option `warn_export_vars` was erroneously written as `warn_exported_vars`
in Makefiles of dialyzer and typer. As a result, `erlc` was silent about such
warnings (why on earth doesn't it complain on unrecognized options??) which
were corrected as part of this change.
Development versions
Development versions
Merge branch 'maint-17' into maint

Conflicts:
	OTP_VERSION
	erts/vsn.mk
Merge branch 'maint'

Conflicts:
	OTP_VERSION
	erts/vsn.mk
inets: Cleaned up inets_sup_SUITE - removing hard coded port for httpd
Merge branch 'ia/inets/test-remove-hard-coded-httpd-port' into maint

* ia/inets/test-remove-hard-coded-httpd-port:
  inets: Cleaned up inets_sup_SUITE - removing hard coded port for httpd