ssh: Test and enhance handling of nonexistent subsystem
ssh: Ctify test doc
ssh: Prepare for upcoming release

Note: If more things are added before the next releas the
appup will need more updates.
Merge branch 'ia/ssh/errorhandling-nonexisting-subsystem/OTP-10714' into maint

* ia/ssh/errorhandling-nonexisting-subsystem/OTP-10714:
  ssh: Prepare for upcoming release
  ssh: Ctify test doc
  ssh: Test and enhance handling of nonexistent subsystem
ssl: correct test case
Merge branch 'ia/ssl/tcp_connect_test' into maint

* ia/ssl/tcp_connect_test:
  ssl: correct test case
Implement add_report_sup_handler which calls gen_event:add_sup_handler
Fix http_request:http_headers/1 to send content-length when length is zero

In R16B01, the http_request:http_headers/1 function removes the content-length
field from the HTTP headers if the content length is zero. This results in
some (perhaps many) HTTP servers rejecting POSTs and PUTs without data with
a 411 status word. From RFC2616, section 14.13: "Any Content-Length greater than
or EQUAL to zero is a valid value".
Fix the title of hipe_app documentation page
Merge branch 'dg/win_icon' into pu
Merge branch 'sk/odbc64' into pu
Merge branch 'rc/break-out-asserts' into pu
Merge branch 'mh/fix-emacs-pkg-flymake-dep' into pu
Merge branch 'an/http11_content_length_zero' into pu
Merge branch 'mh/cdv-osx-default-browser' into pu
Merge branch 'ats/observer_tv_improper_lists' into pu
Merge branch 'as/tls-psk-srp-suites-ECC' into pu
Merge branch 'sm/fix-disksup-susv3' into pu
Merge branch 'pn/error-logger-sup_handler' into pu
Merge branch 'cm/bug-http-content-length-zero' into pu