for the positive case to a separate method and used it directly from find()
and findWildcardMatch().  Moved detailed comments of findWildcardMatch to
the head of its definition so that the function body will be physically
concise.

Added utility to put messages in a message file into alphabetical
order and, for ease of further editing, the data source message file
in alphabetical order.

ones for each subcase of find().

eliminating the need for making a copy of it)

their definitions.  define 'origin' immediately before it's used, which
also makes the method a bit more efficient in the delegation case.

(NXDOMAIN/empty name/wildcard) case to a separate method to make the main
method even more concise.

findWildcardMatch() instead of first_ns and last_known, thereby eliminating
the need for defining and using these variables.

in findWildcardMatch().  as a result we can now use the common FindResult
struct as the return type of findWildcardMatch().

code logic with intermediate state variable with direct return.
(as a result of some log points were lost, which should be recovered
later)

sufficiently short.

 - constify things as much as possible
 - a bit of style fixes (brace position, etc)

updated the test data schema for the diffs table.

Conflicts:
	ChangeLog

the exact evaluation of the requested URI is added at git
88147da5.