This fixes build issues discovered during code review.

Test was wrong because fromJSON function filters out low numbers anyway
and caused exception when preparing the data for the unit test.

The index object used to get the range of searched options was local
to the function and when returned from it search results were destroyed
along with index (Mac, Solaris only). The alternative solution to
copy results to another container was not picked due to performance
considerations.

discussed on jabber

This should fix the issue reported by the solaris-gcc builder

Conflicts:
	doc/Doxyfile
	src/bin/auth/Makefile.am
	src/bin/auth/benchmarks/Makefile.am
	src/bin/auth/statistics.h
	src/bin/auth/tests/Makefile.am
	src/bin/auth/tests/auth_srv_unittest.cc

This test is affected by recently added AllocEngine tests. They
will be fixed shortly, but until that happens, CfgMgr.subnet6
test will remain disabled.

Introduction of the ConfigurableClientList::getCachedZoneWriter() method.

To ztable_segment_. The previous could be misunderstood, we have other
segments too.

Conflicts:
	ChangeLog
	src/lib/dhcp/subnet.cc
	src/lib/dhcp/subnet.h
	src/lib/dhcp/tests/subnet_unittest.cc

trivial, directly committing.