Sets conn's expected server identity, which is used both to tell
servers on virtual hosts which certificate to present, and also
to let conn know what name to look for in the certificate when
performing G_TLS_CERTIFICATE_BAD_IDENTITY validation, if enabled.
Sets conn's expected server identity, which is used both to tell servers on virtual hosts which certificate to present, and also to let conn know what name to look for in the certificate when performing G_TLS_CERTIFICATE_BAD_IDENTITY validation, if enabled.