imklog now basically works, but needs quite some more work to do

saving this area of work, because some further clarification
is needed. Do not try to run the current imklog, it will fail.

... far from being functional at this time!

...which permits to set a new console log level while rsyslog is active

... hopefully reducing the number of allocs/frees as well as overall
memory usage in a busy system (plus that these shared properties hopefully
remain in cache longer than its single-instance counterparts...)

This sets stage to enable use of the property-interface to speed
up things (mildly), the next step to be done. I have also fixed one
regression of yesterday's changes.