Update to 2.0.24.

Fixup the if_ and if_errcoll_ plugins, interface names can be longer than 5
chars.  Add an if_packets_ plugin.

Allow people to have a custom crontab that won't be touched when
installing/deinstalling.

Sponsored by:	Absolight


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@371586 35697150-7ecd-e111-bb59-0022644237b5