Added braces around some single-line if blocks missed in the previous
coding-guidelines changes
Further work on BIND9 style conformance, where it doesn't contradict BIND10
style.  Not yet complete.
Added comments in headers and source files
Added BIND10 headers to remaining files
Removed debugging code left in
Added more gtests, for option combinations
Removed files that are not part of currently tested code base
Addressed other requirements from code review (not yet complete)