configure.ac:

configure.ac:
  Add --enable-force-defer-DNS
  Helps debugging deferred DNS lookups.
ChangeLog:
  Bug 761:  internal resolver does not seem to honor -4/-6 qualifiers
ntp_config.c:
  Bug 761:  internal resolver does not seem to honor -4/-6 qualifiers
  FORCE_DEFER_DNS helps debugging.
  Pass no_needed to ntp_intres, first step on Bug 975.
ntp_intres.c:
  Bug 761:  internal resolver does not seem to honor -4/-6 qualifiers
  Take no_needed from ntp_config, first step on Bug 975.

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