sysutils/lsof: update to 4.96.0-freebsd

ChangeLog:

               [FreeBSD] configure: suggest variable to set if FreeBSD
sys not
               found
               submitted by @emaste

		Updated 00FAQ with lookup to open files via mountpoint
		Provided by Jacob Chapman in #240

                [FreeBSD] modernize API usage and remove legacy FreeBSD
releases
                Contributor DamjanJovanovic (#184) Ed Maste (#250, #251,
                Warner Losh (#253)