improves upid_read_status with: * ignore multiple newlines at the end * remove all code that could panic (array index access) the one place where we access with '[pos+1..]' is ok since we explicitely test the len of the vector, this is done to let rust optimize away the range checks, so it cannot panic Signed-off-by: Dominik Csapak <d.csapak@proxmox.com>