Man: clarify loglevel for JUL domain

Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: protect close_write_flag with the rotation lock

Acked-by: Julien Desfossez <julien.desfossez@efficios.com>
Signed-off-by: David Goulet <dgoulet@efficios.com>
Fix: relayd cleanup leak on error in splice()

Signed-off-by: David Goulet <dgoulet@efficios.com>