/usr/include/qxt/QxtWeb/ is in libqxt-dev 0.6.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/qxt/QxtWeb/QxtAbstractHttpConnector
/usr/include/qxt/QxtWeb/QxtAbstractWebService
/usr/include/qxt/QxtWeb/QxtAbstractWebSessionManager
/usr/include/qxt/QxtWeb/QxtHtmlTemplate
/usr/include/qxt/QxtWeb/QxtHttpServerConnector
/usr/include/qxt/QxtWeb/QxtHttpSessionManager
/usr/include/qxt/QxtWeb/QxtMail
/usr/include/qxt/QxtWeb/QxtScgiServerConnector
/usr/include/qxt/QxtWeb/QxtSendmail
/usr/include/qxt/QxtWeb/QxtWeb
/usr/include/qxt/QxtWeb/QxtWebCgiService
/usr/include/qxt/QxtWeb/QxtWebContent
/usr/include/qxt/QxtWeb/QxtWebErrorEvent
/usr/include/qxt/QxtWeb/QxtWebEvent
/usr/include/qxt/QxtWeb/QxtWebFileUploadEvent
/usr/include/qxt/QxtWeb/QxtWebPageEvent
/usr/include/qxt/QxtWeb/QxtWebRedirectEvent
/usr/include/qxt/QxtWeb/QxtWebRemoveCookieEvent
/usr/include/qxt/QxtWeb/QxtWebRequestEvent
/usr/include/qxt/QxtWeb/QxtWebServiceDirectory
/usr/include/qxt/QxtWeb/QxtWebSlotService
/usr/include/qxt/QxtWeb/QxtWebStoreCookieEvent
/usr/include/qxt/QxtWeb/qxtabstracthttpconnector.h
/usr/include/qxt/QxtWeb/qxtabstractwebservice.h
/usr/include/qxt/QxtWeb/qxtabstractwebsessionmanager.h
/usr/include/qxt/QxtWeb/qxtabstractwebsessionmanager_p.h
/usr/include/qxt/QxtWeb/qxthtmltemplate.h
/usr/include/qxt/QxtWeb/qxthttpsessionmanager.h
/usr/include/qxt/QxtWeb/qxtweb.h
/usr/include/qxt/QxtWeb/qxtwebcgiservice.h
/usr/include/qxt/QxtWeb/qxtwebcgiservice_p.h
/usr/include/qxt/QxtWeb/qxtwebcontent.h
/usr/include/qxt/QxtWeb/qxtwebevent.h
/usr/include/qxt/QxtWeb/qxtwebservicedirectory.h
/usr/include/qxt/QxtWeb/qxtwebservicedirectory_p.h
/usr/include/qxt/QxtWeb/qxtwebslotservice.h