http://www.rfc-editor.org/rfc/rfc8160.txt
RFC 8160: IUTF8 Terminal Mode in Secure Shell (SSH), S. Tatham, D. Tucker2017-04-01T23:00:00-00:00This document specifies a new opcode in the Secure Shell terminal modes encoding. The new opcode describes the widely used IUTF8 terminal mode bit, which indicates that terminal I/O uses UTF-8 character encoding.