In particular: fix an off-by-one when handling long input lines,
and make an effort to terminate any children started by the PMDA
at exit (clean exit, esp. from pcp start/stop script, improving
runtime of that script significantly when Perl agents deployed).
Couple more bug fixes in the Perl PMDA interface.
In particular: fix an off-by-one when handling long input lines,
and make an effort to terminate any children started by the PMDA
at exit (clean exit, esp. from pcp start/stop script, improving
runtime of that script significantly when Perl agents deployed).