slfritchie

Purpose: To prevent scheduler collapse by disabling scheduler sleep periods.
This patch is relative to R16B01 pre-release but may be applied (with "fuzz")
on R15B01 and R15B03-1 without difficulty.

The new flag, "+zdss", must be used with "+scl false" flag to be successful.
See the erl.xml document for a description.  Example use:

  erl +scl false +zdss 500:500

Note that this flag used to be called "+zdnfgtse"