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                        zero if the input was less than NS_INTERVAL
                        nanoseconds.  Round up instead. [RT #18549]

                        [RT #18283]

                        tables. [RT #18409]

   External lookups are slow.

                        was set. [RT #18528]

                        wrong value if excessively large netmasks are
                        supplied. [RT #18512]

			at load time. [RT #18536]

                        implementation.  Allow the use of kqueue,
                        epoll and /dev/poll to be selected at compile
                        time. [RT #18277]

                        if it was a NXRRSET in the validator. [RT #18447]

			the max number of sockets. [RT #18493]
			Use caution: this option may not work for some
			operating systems without rebuilding named.

                        should not be used for isc_sockettype_fdwatch sockets.
                        [RT #18521]

			[RT #18430]

			unexpectedly fail with an 'address already in use'
			error. [RT #18411]

			internal maximum. [RT #18460]

			in rbtdb.c. [RT #18455]

			causing various troubles such as dead lock and
			recursive lock acquisition. [RT #18311, #18456]

Reword one sentence (to not say "number" twice).
Capitalize RDATA to be consistent.
Fix one mispelled word.