Merge branch 'ua/os-version-capability'

The value of "uname -s" is by default sent over the wire as a part of the "version" capability. * ua/os-version-capability: agent: advertise OS name via agent capability t5701: add setup test to remove side-effect dependency version: extend get_uname_info() to hide system details version: refactor get_uname_info() version: refactor redact_non_printables() version: replace manual ASCII checks with isprint() for clarity