pmie_daily - assorted minor fixups
pmie_daily - assorted minor fixups

- handling of realpath equivalent in _unsymlink_path() was not
  strictly correct, and failed on Mac OS X where /tmp is really
  a symlink to /private/tmp
- the test for existence of a process used /proc/pinfo/<pid> or
  /proc/<pid> ... the exit status from ps -p is a much more
  portable way to do this
- improved diagnostics with -VV to help track matching running
  processes against the control file and the contents of
  $PCP_TMP_DIR/pmie

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