003 - linux filtering fixup
003 - linux filtering fixup

mem.vmstat.* metrics not available on older kernels.

Cleaned up some of the other sed filtering to be tighter.

adfernandes/pcp,tjanez/pcp,ryandoyle/pcp_original,aeg-aeg/pcpfans,wuliming/pcp,edwardt/pcp,wuliming/pcp,andyvand/cygpcpfans,aeg-aeg/pcpfans,tjanez/pcp,ryandoyle/pcp_original,ryandoyle/pcp_original,prasincs/pcp,prasincs/pcp,ryandoyle/pcp_original,andyvand/cygpcpfans,mbaldessari/pcp,edwardt/pcp,ryandoyle/pcp_original,adfernandes/pcp,prasincs/pcp,adfernandes/pcp,prasincs/pcp,wuliming/pcp,andyvand/cygpcpfans,wuliming/pcp,tjanez/pcp,adfernandes/pcp,ryandoyle/pcp_original,wuliming/pcp,ryandoyle/pcp_original,tjanez/pcp,adfernandes/pcp,mbaldessari/pcp,mbaldessari/pcp,adfernandes/pcp,mbaldessari/pcp,andyvand/cygpcpfans,andyvand/cygpcpfans,tjanez/pcp,andyvand/cygpcpfans,mbaldessari/pcp,adfernandes/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,ryandoyle/pcp_original,prasincs/pcp,wuliming/pcp,edwardt/pcp,tjanez/pcp,mbaldessari/pcp,tjanez/pcp,edwardt/pcp,aeg-aeg/pcpfans,wuliming/pcp,aeg-aeg/pcpfans,prasincs/pcp,adfernandes/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,prasincs/pcp,edwardt/pcp,wuliming/pcp,edwardt/pcp,aeg-aeg/pcpfans,edwardt/pcp,tjanez/pcp,prasincs/pcp,aeg-aeg/pcpfans,edwardt/pcp