Update pcpintro, removing reference to no-longer-used env var.
Update pcpintro, removing reference to no-longer-used env var.

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