Initalize subsections for CONF_PARSER

The CONF_PARSER may have a subsection.  The config file may not
supply one.  When that happens, we want the defaults from the
CONF_PARSER to still be applied.  So, we create an empty
subsection, which allows the defaults to be parsed
Fix debugging messages
Remove "out of memory" log messages.

They're not needed.  If we're OOM, the server core will print
them, or the entire system will go down.
Unused and un-needed
Fix radlog(L_ERR and other style violations
Clean it up so that it makes sense.

Don't call radlog(L_INFO,...) for messages.
Don't repeat code ad nauseum.  Use a macro.
Move log message to a sane configuration name
Added "show config <path>" to radmin
Fix typo and do chrgrp of radiusd (if applicable)

Manual fix for pull #262
Run through the format script