avoid a warning in local mode
avoid the debug msgs on STDOUT
initialize DESCRIPTION with the sysdescr
add a offline flag
mark {AUTHSNMP,MODELSNMP}_ID to avoid confusion

to avoid confusion with the IDs server side.
_findModelInDir always returns a {}
easier to read and avoid uninitialized warnings
catch errror if XML::TreePP fails to load model XML
temporary script to test the experimental branch
add a missing alt2canonical()
don't inject empty file
avoid a warning if the file is empty