autor duplicated + < and > fixes.

Please someone who know the code, double check this one.
It does look that translation for 2 options were missing.

manager / Synchronize terms in de and de-informal

The refshow configuration option wasn't used as described anymore
already in the latest release and after the introduction of the media
usage index the parameter is also no longer relevant for internal
optimization. The only place where it was still used is the no longer
used search_references()-function which is removed here, too.

The refshow configuration option wasn't used as described anymore
already in the latest release and after the introduction of the media
usage index the parameter is also no longer relevant for internal
optimization. The only place where it was still used is the no longer
used search_references()-function which is removed here, too.

%GROUP% is the same as %USER% except it's done on each group a user is
in.
%USER% and %GROUP% cannot be mixed on an ACL line.