/usr/include/ql/indexes/ibor/ is in libquantlib0-dev 1.9.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ql/indexes/ibor/all.hpp
/usr/include/ql/indexes/ibor/aonia.hpp
/usr/include/ql/indexes/ibor/audlibor.hpp
/usr/include/ql/indexes/ibor/bbsw.hpp
/usr/include/ql/indexes/ibor/bkbm.hpp
/usr/include/ql/indexes/ibor/cadlibor.hpp
/usr/include/ql/indexes/ibor/cdor.hpp
/usr/include/ql/indexes/ibor/chflibor.hpp
/usr/include/ql/indexes/ibor/dkklibor.hpp
/usr/include/ql/indexes/ibor/eonia.hpp
/usr/include/ql/indexes/ibor/euribor.hpp
/usr/include/ql/indexes/ibor/eurlibor.hpp
/usr/include/ql/indexes/ibor/fedfunds.hpp
/usr/include/ql/indexes/ibor/gbplibor.hpp
/usr/include/ql/indexes/ibor/jibar.hpp
/usr/include/ql/indexes/ibor/jpylibor.hpp
/usr/include/ql/indexes/ibor/libor.hpp
/usr/include/ql/indexes/ibor/nzdlibor.hpp
/usr/include/ql/indexes/ibor/nzocr.hpp
/usr/include/ql/indexes/ibor/seklibor.hpp
/usr/include/ql/indexes/ibor/shibor.hpp
/usr/include/ql/indexes/ibor/sonia.hpp
/usr/include/ql/indexes/ibor/tibor.hpp
/usr/include/ql/indexes/ibor/trlibor.hpp
/usr/include/ql/indexes/ibor/usdlibor.hpp
/usr/include/ql/indexes/ibor/zibor.hpp