Properly ignore everything in lib/ssh/doc/html/

File SSH_protocols.png is versioned in both lib/ssh/doc/html/
and lib/ssh/doc/src/ whereas it should be versioned only in the latter
and ignored in the former.
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.
Fixed rekeying initiation and secured testcase
Prepare release
Fixed appup for 2.1.5
ssh: Test and enhance handling of nonexistent subsystem
ssh: Prepare for upcoming release

Note: If more things are added before the next releas the
appup will need more updates.
Merge branch 'fredrik/ssh/fix-rekeying/OTP-10911' into maint-r16

* fredrik/ssh/fix-rekeying/OTP-10911:
  Fixed appup for 2.1.5

Conflicts:
	lib/ssh/src/ssh.appup.src
Merge branch 'maint-r16' into maint

Conflicts:
	lib/ssh/src/ssh.appup.src
	lib/ssh/test/ssh_sftp_SUITE.erl
Removed timing rekeying
Prepare release
Merge branch 'maint-r16' into maint
Merge branch 'nox/ssh/fix-ssh-html-doc/OTP-10983' into maint

* nox/ssh/fix-ssh-html-doc/OTP-10983:
  Properly ignore everything in lib/ssh/doc/html/
ssh: If not valid expression, rather than generate a error, try to use the cmd.
ssh: unicode adaptions
Convert XML files to UTF-8, where needed
Convert XML files to UTF-8
Merge branch 'hb/unicode/OTP-10907'

* hb/unicode/OTP-10907:
  otp_SUITE: Add test cases to ensure that OTP conventions are obeyed
  Convert XML files to UTF-8
  Convert XML files to UTF-8, where needed
  Remove the "coding: utf-8" comment from all Erlang source files
  Update primary bootstrap
  Change the default encoding of Erlang files to UTF-8