/node.d/tomcat_threads.in: Fix if {'currentThreadsBusy'} go false when it is 0, and add a total value as 'currentThreadCount' so that the chart looks more readable.
Fix minor typos in Munin master index.rst

Fixed some minor typos.
Merge remote branch 'pull/233' into devel

* pull/233:
  Fix minor typos in Munin master index.rst
Merge commit '814417f' into devel

This merge is part of PR #135.
I edited the useless merge out of it.

* commit '814417f':
  /node.d/tomcat_threads.in: Fix if {'currentThreadsBusy'} go false when it is 0, and add a total value as 'currentThreadCount' so that the chart looks more readable.