> Add sysctl.conf.5 manpage.

Is it intentional to have {daily,weekly,monthly}.conf.5 to point to
{...}.8 in this commit? the man/ flist hasn't been updated to reflect such,
and thus building release fails with

=======  6 extra files in DESTDIR  =========

Files in DESTDIR but missing from flist.
File is obsolete or flist is out of date ?
------------------------------------------
./usr/share/man/cat8/daily.0
./usr/share/man/cat8/monthly.0
./usr/share/man/cat8/weekly.0
./usr/share/man/man8/daily.8
./usr/share/man/man8/monthly.8
./usr/share/man/man8/weekly.8
=========  end of 6 extra files  ===========
*** [checkflist] Error code 1