/usr/ is in libqhttpengine-dev 0.1.0+dfsg1-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/QHttpEngine/
/usr/include/QHttpEngine/QFilesystemHandler
/usr/include/QHttpEngine/QHttpHandler
/usr/include/QHttpEngine/QHttpParser
/usr/include/QHttpEngine/QHttpServer
/usr/include/QHttpEngine/QHttpSocket
/usr/include/QHttpEngine/QIByteArray
/usr/include/QHttpEngine/QIODeviceCopier
/usr/include/QHttpEngine/QLocalFile
/usr/include/QHttpEngine/QObjectHandler
/usr/include/QHttpEngine/qfilesystemhandler.h
/usr/include/QHttpEngine/qhttpengine.h
/usr/include/QHttpEngine/qhttphandler.h
/usr/include/QHttpEngine/qhttpparser.h
/usr/include/QHttpEngine/qhttpserver.h
/usr/include/QHttpEngine/qhttpsocket.h
/usr/include/QHttpEngine/qibytearray.h
/usr/include/QHttpEngine/qiodevicecopier.h
/usr/include/QHttpEngine/qlocalfile.h
/usr/include/QHttpEngine/qobjecthandler.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/cmake/
/usr/lib/x86_64-linux-gnu/cmake/QHttpEngine/
/usr/lib/x86_64-linux-gnu/cmake/QHttpEngine/QHttpEngineConfig-none.cmake
/usr/lib/x86_64-linux-gnu/cmake/QHttpEngine/QHttpEngineConfig.cmake
/usr/lib/x86_64-linux-gnu/cmake/QHttpEngine/QHttpEngineConfigVersion.cmake
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/QHttpEngine.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libqhttpengine-dev/
/usr/share/doc/libqhttpengine-dev/changelog.Debian.amd64.gz
/usr/share/doc/libqhttpengine-dev/changelog.Debian.gz
/usr/share/doc/libqhttpengine-dev/copyright
/usr/lib/x86_64-linux-gnu/libQHttpEngine.so