OpenBSD: update

* Set process data for:
    - minflt
    - majflt
    - processor
    - nlwp

* Drop unimplemented nlwp column

* Scan userland threads

* Mark a 'Thread is currently on a CPU.' with 'R', and processes
  'Currently runnable' with 'P', do confine with man:ps(1) and Linux.
  See https://man.openbsd.org/ps.1

* Show CPU frequency

openbsd/OpenBSDProcessList.h

@@ -42,6 +42,7 @@ typedef struct OpenBSDProcessList_ {
    kvm_t* kd;
 
    CPUData* cpus;
+   int cpuSpeed;
 
 } OpenBSDProcessList;