Connection logging scripts should be two separate files (W)

[wildtayne]

Connection logging setup has two parts - One time setting of server configuration, and creation of logging functions. These should be split into their own SQL files.

[wildtayne]

I've relocated all of the logging setup (statements that need to be run only once), including the ddl triggers, into prepareUserLogging.sql. We can discuss if we want to break the ALTER SYSTEM statements into a separate file.

[wildtayne]

I propose that the logging setup all be kept in the current file. We may also want to remove the log columns from classdb.student and add them as ALTER statements to prepareUserLogging.sql. This would make the logging system self-contained and optional.