NEX-2320 svc_queueclose() could wake up too much threads
Reviewed by: Rick Mesta <rick.mesta@nexenta.com>
Reviewed by: Gordon Ross <gordon.ross@nexenta.com>
Reviewed by: Dan Fields <dan.fields@nexenta.com>
Reviewed by: Josef Sipek <josef.sipek@nexenta.com>
Reviewed by: Tony Nguyen <tony.nguyen@nexenta.com>