Make DEBUG macro invocations variadic
    
    Use a script to update DEBUG macro invocations to use it as a variadic
    macro, supplying format string and its arguments directly, instead of
    wrapping them in parens.
    
    This script was used to update the code
    (identical to commit a3c8390d19593b1e5277d95bfb4ab206d4785150):
    
    grep -rwl --include '*.[hc]' DEBUG . |
        while read f; do
            mv "$f"{,.orig}
            perl -e \
                'use strict;
                 use File::Slurp;
                 my $text=read_file(\*STDIN);
                 $text=~s#(\bDEBUG\s*\([^(]+)\((.*?)\)\s*\)\s*;#$1$2);#gs;
                 print $text;' < "$f.orig" > "$f"
            rm "$f.orig"
        done
    
    Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>
    Reviewed-by: Stephen Gallagher <sgallagh@redhat.com>
    Reviewed-by: Simo Sorce <simo@redhat.com>