Do what r5107 for system ID for public IDs.
Do what r5107 for system ID for public IDs.

svn path=/trunk/hubbub/; revision=5108

servo/libhubbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub,adamwight/wmf-parsoid-libhubbub,Achal-Aggarwal/hibbub,adamwight/wmf-parsoid-libhubbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub,adamwight/wmf-parsoid-libhubbub,adamwight/wmf-parsoid-libhubbub,servo/libhubbub,adamwight/wmf-parsoid-libhubbub,Achal-Aggarwal/hibbub,servo/libhubbub,prepare/netsurf_libhubbub,prepare/netsurf_libhubbub,servo/libhubbub,servo/libhubbub,prepare/netsurf_libhubbub,Achal-Aggarwal/hibbub