Close #80

* Use getopt inseat of manual parsing
* Add -x as short option of --help-extra
* Make -h and -x different and accumulative options

* Fix logic in lewi_mask_DisableDLB by enable only CPUs that
    change its state, this is needed to prevent re-enabling
    CPUs not used by the user.

* Other modifications needed for the issue:
  - Add missing lewi_mask_Enable
  - Make old optional vicitm/victimlist arguments into mandatory
      new_guest(s) and victim(s) output arguments
  - Update tests to use new prototypes and check new arg outputs

* ReclaimCpuMask can't return ERR_PERM and update some other CPUs
* AcquireCpus needs to decrement also if DLB_NOTED
* Acquire and Reclaim must oversubscribe CPUs in polling mode
* Update tests

Fix #81

See #84

See #84

See #84

See #84

See #84

Add CPU -> Lend CPU
Recover CPU -> Reclaim CPU

Close #83
AcquireCpus now reclaims as many owned CPUs as needed, then
borrows non-owned CPUs and lastly submits a global petition.

Lend_light -> lewi
New -> lewi_mask

This reverts commit 06113e2f.

See #74