Also made it more portable not to use select.KQ_* until the add/delete
methods are actually called.

* Fixed a comment
* Modified condition in MockZone to match the one in MemoryZone.

* kqueue maybe doesn't survive fork on MacOS
* add_kqueue_socket wanted socket, not fileno
* Some systems don't have MSG_DONTWAIT, so we set the socket nonblocking

Some of our built machines time out, for two possible reasons:
* They have long buffer before they start blocking. Therefore the amount
  of data sent is increased.
* They have clock with low precision, so if now - last_sent > 0.1:
  happens after a long time. So the timeout waiting for that was
  increased.

Conflicts:
	src/bin/resolver/resolver.cc

for now. We'll need to come up with a structural way to test those

It could happen in rare occasions that the subprocess survived death of
the tests, mostly when exceptions happened in the parent process and it
didn't kill it. So there's a finally now and the subprocess has a
limited life length just in case it still slipped somehow without kill.

Conflicts:
	src/bin/resolver/resolver.cc

Conflicts:
	doc/Doxyfile

The port used in the test was the same as the default port for the
bind10 server (5300), so the test failed if bind10 was already running on the
system. Changed it to 5321.

As suggested in the review in ticket #487, an additional non-Doxygen
comment was added to the Category enum to indicate that for error()
to work, non-error codes should come before error codes.

The tests only received data, but did not check it is correct. Now it is
checked.

Using boolean parameter instead of cryptic flag-like one. It is less
flexible, but the flexibility isn't really needed.

Removed some unused debug code and cleaned up some white space.

Pointed out in review.
A test that would catch it needs to be written.

mostly whitespace, one comment update and two lines of dead code

going to push without review.

 - did it for non .cc/.h files
 - some files had 'already substitued' $Id$'s (which were probably not
   under keyword substitution with svn; just copied from some other
   file).  they were overlooked in the previous cleanups
 - there were lower cased $Id$, which were overlooked, too.