src/pmlogger/pmlogger_check.sh: use pmlogger's strftime template feature for archive name
src/pmlogger/pmlogger_check.sh: use pmlogger's strftime template feature for archive name

Instead of expanding LOGNAME in pmlogger_check.sh we pass %Y%m%d.%0H.%0M
as the archive name.

Drop all the duplicate archive name collision logic, as pmlogger now
handles this itself (by detecting the duplicate name and taking an
avoidance strategy) ... so no more -00, -01, ... nonsense in archive
names.

Some refactoring as pmlogger, not pmlogger_check determines the real name
of the archive.

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