/usr/include/crtmpserver/thelib/netio/ is in crtmpserver-dev 1.0~dfsg-5.
This file is owned by root:root, with mode 0o755.
..
/usr/include/crtmpserver/thelib/netio/epoll/
/usr/include/crtmpserver/thelib/netio/epoll/inboundnamedpipecarrier.h
/usr/include/crtmpserver/thelib/netio/epoll/iohandler.h
/usr/include/crtmpserver/thelib/netio/epoll/iohandlermanager.h
/usr/include/crtmpserver/thelib/netio/epoll/iohandlermanagertoken.h
/usr/include/crtmpserver/thelib/netio/epoll/iotimer.h
/usr/include/crtmpserver/thelib/netio/epoll/stdiocarrier.h
/usr/include/crtmpserver/thelib/netio/epoll/tcpacceptor.h
/usr/include/crtmpserver/thelib/netio/epoll/tcpcarrier.h
/usr/include/crtmpserver/thelib/netio/epoll/tcpconnector.h
/usr/include/crtmpserver/thelib/netio/epoll/udpcarrier.h
/usr/include/crtmpserver/thelib/netio/kqueue/
/usr/include/crtmpserver/thelib/netio/kqueue/inboundnamedpipecarrier.h
/usr/include/crtmpserver/thelib/netio/kqueue/iohandler.h
/usr/include/crtmpserver/thelib/netio/kqueue/iohandlermanager.h
/usr/include/crtmpserver/thelib/netio/kqueue/iohandlermanagertoken.h
/usr/include/crtmpserver/thelib/netio/kqueue/iotimer.h
/usr/include/crtmpserver/thelib/netio/kqueue/stdiocarrier.h
/usr/include/crtmpserver/thelib/netio/kqueue/tcpacceptor.h
/usr/include/crtmpserver/thelib/netio/kqueue/tcpcarrier.h
/usr/include/crtmpserver/thelib/netio/kqueue/tcpconnector.h
/usr/include/crtmpserver/thelib/netio/kqueue/udpcarrier.h
/usr/include/crtmpserver/thelib/netio/netio.h
/usr/include/crtmpserver/thelib/netio/select/
/usr/include/crtmpserver/thelib/netio/select/inboundnamedpipecarrier.h
/usr/include/crtmpserver/thelib/netio/select/iohandler.h
/usr/include/crtmpserver/thelib/netio/select/iohandlermanager.h
/usr/include/crtmpserver/thelib/netio/select/iotimer.h
/usr/include/crtmpserver/thelib/netio/select/stdiocarrier.h
/usr/include/crtmpserver/thelib/netio/select/tcpacceptor.h
/usr/include/crtmpserver/thelib/netio/select/tcpcarrier.h
/usr/include/crtmpserver/thelib/netio/select/tcpconnector.h
/usr/include/crtmpserver/thelib/netio/select/udpcarrier.h