src/pmlogctl/pmlogctl.sh: more small changes
src/pmlogctl/pmlogctl.sh: more small changes

- refine handling of primary pmlogger to reduce warning chatter in some
  cases
- add rudimentary pmlogger.log dredging for "dead" loggers with -v and
  status command
- cull TODO list (multiple pmloggers per control file "just works"(tm))

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp