bugfix zombie procs

src/rsnmplib/processes.rs

@@ -56,6 +56,7 @@ pub(crate) fn count_processes(proc_path: &Path) -> io::Result<Ptypes> {
                                 75 => counts.wakekill += 1, // K
                                 87 => counts.waking += 1,   // W
                                 73 => counts.idle += 1,     // I
+                                90 => counts.zombie += 1,   // Z
                                 _ => warn!("unknown proc status value {}", byteval),
                             }
                         }