Fixed setting the start time when querying in sacct to the beginning of the day if not set previously.  Some extra debugging, and a fix to a regression test with a bad name in it

with Linux kernel coding standard (finish work begun by Mark Grondona a few
months ago)

add pointer to lua documentation/download site

flushed out the mysql plugin for get events.  sreport will have new reports for it now, and we should also update the documentation of the plugin to include the new function

Fix for case sensitive databases when a slurmctld has a mixed case clustername to lower case the string to easy compares.