also don't stop receiving due to errors from async_receive_from().
some other minor cleanups are made too.

otherwise it would result in an uncatchable exception and force the
program to terminate.  some exceptions are still considered super rare
and fatal, and they are still propagated (mainly from the io_service
and deadline timer).  errors on close() are just ignored (there
wouldn't be much we can do to recover in this case anyway).

Further, changed the handling of errors on the result of async_accept():
instead of stop accepting on some errors, log them and keep accepting
new connections.  on a closer look at the code I believe that's more
appropriate; silent stop would be rather confusing (if the error were
really fatal we should rather invoke an exception and trigger termination),
and cases like EMFILE definitely shouldn't cause this situation.
errors that can caused by stop() should still result in stopping accept(),
and the new code behaves that way.

perfdhcp.

Clean-ups so one doesn't have to pass the hash twice when deleting an NSEC3
record.

files into --localstatedir/bind10.

Provide separate list of parameter strings for deleting NSEC3 records.
It is cleaner to have separate enum for listing the parameters needed to
delete NSEC3 than re-using generic delete parameters and having the hash
passed twice.

command line parameters.

This reverts commit 65f68f7b.

Fix SQLite backend so the deletes are not so slow.

This is the urgent part of the fix; we'll have another half of the branch
later, to clean up some details.

This overcomes the build failure on Solaris where it complains about
incompatible types of ? operands.

mysql_lease_mgr.

I introduced problem by fixing a typo in a comment in a zone file.
The character positions or file sizes of the file were hardcoded
in the unit test. I had seen the failure on my system but didn't
associate it. (My mistake for not looking closely.)

The typo fix added one character so changed the hardcoded 549 to 500
and 506 to 507.

(Later maybe some macros should be used for this?)

merged

mostly in documentation or in comments

reviewed by muks via jabber

includes output changes for two isc_throw.