libmetrics: FreeBSD: use vm.vmtotal for process count instead of kern.proc.all
libmetrics: FreeBSD: use vm.vmtotal for process count instead of kern.proc.all

fixes BUG150 and BUG151 where MAC or BSD security levels were being used to
restrict process listings and gmond was running as an unprivileged user.



git-svn-id: 27e0aca8c7a52a9ae65dfba2e16879604119af8c@910 93a4e39c-3214-0410-bb16-828d8e3bcd0f

fastly/ganglia,fastly/ganglia,fastly/ganglia,fastly/ganglia,fastly/ganglia