I don't think "respectfully" is what was meant here ...
user name used for mapping is
unless include_realm has been set to 0, in which case
username (or username/hostbased)
is what is seen as the system username when mapping.
user name used for mapping is
unless include_realm has been set to 0, in which case
username (or username/hostbased)
is what is seen as the system username when mapping.