The same is still present in 2.3 and 2.4 documentation as well as in the man page: man innobackupex| --scpopt = SCP-OPTIONS
Fragment from https://www.percona.com/doc/percona-xtrabackup/2.4/innobackupex/innobackupex_option_reference.html
" --scpopt = SCP-OPTIONS
This option accepts a string argument that specifies the command line options to pass to scp when the option --remost-host is specified. If the option is not specified, the default options are -Cp -c arcfour"
The same is still present in 2.3 and 2.4 documentation as well as in the man page:
man innobackupex|
--scpopt = SCP-OPTIONS
Fragment from https:/ /www.percona. com/doc/ percona- xtrabackup/ 2.4/innobackupe x/innobackupex_ option_ reference. html
" --scpopt = SCP-OPTIONS
This option accepts a string argument that specifies the command line options to pass to scp when the option --remost-host is specified. If the option is not specified, the default options are -Cp -c arcfour"