/usr/include/ is in libace-inet-dev 6.3.3+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ace/
/usr/include/ace/INet/
/usr/include/ace/INet/HTTP_Session.cpp
/usr/include/ace/INet/HTTP_BasicAuthentication.h
/usr/include/ace/INet/FTP_URL.inl
/usr/include/ace/INet/HeaderBase.inl
/usr/include/ace/INet/HTTP_SessionBase.inl
/usr/include/ace/INet/BufferedStreamBuffer.cpp
/usr/include/ace/INet/FTP_Request.inl
/usr/include/ace/INet/BidirStreamBuffer.cpp
/usr/include/ace/INet/HTTP_BasicAuthentication.inl
/usr/include/ace/INet/HeaderBase.h
/usr/include/ace/INet/ClientRequestHandler.inl
/usr/include/ace/INet/StreamHandler.h
/usr/include/ace/INet/HTTP_Request.h
/usr/include/ace/INet/HTTP_Header.h
/usr/include/ace/INet/FTP_Session.h
/usr/include/ace/INet/HTTP_Request.inl
/usr/include/ace/INet/HTTP_Header.inl
/usr/include/ace/INet/String_IOStream.h
/usr/include/ace/INet/ConnectionCache.h
/usr/include/ace/INet/StreamInterceptor.cpp
/usr/include/ace/INet/HTTP_ClientRequestHandler.inl
/usr/include/ace/INet/HTTP_StreamPolicy.h
/usr/include/ace/INet/Request.h
/usr/include/ace/INet/HTTP_Status.inl
/usr/include/ace/INet/FTP_Response.inl
/usr/include/ace/INet/IOS_util.h
/usr/include/ace/INet/Response.h
/usr/include/ace/INet/HTTP_IOStream.inl
/usr/include/ace/INet/HTTP_Response.h
/usr/include/ace/INet/StreamHandler.cpp
/usr/include/ace/INet/FTP_Response.h
/usr/include/ace/INet/AuthenticationBase.inl
/usr/include/ace/INet/BufferedStreamBuffer.h
/usr/include/ace/INet/BidirStreamBuffer.h
/usr/include/ace/INet/FTP_URL.h
/usr/include/ace/INet/FTP_IOStream.inl
/usr/include/ace/INet/URLBase.h
/usr/include/ace/INet/HTTP_IOStream.h
/usr/include/ace/INet/ClientRequestHandler.h
/usr/include/ace/INet/HTTP_StreamPolicyBase.cpp
/usr/include/ace/INet/HTTP_Status.h
/usr/include/ace/INet/Sock_IOStream.cpp
/usr/include/ace/INet/StreamInterceptor.h
/usr/include/ace/INet/HTTP_Response.inl
/usr/include/ace/INet/RequestHandler.h
/usr/include/ace/INet/FTP_ClientRequestHandler.inl
/usr/include/ace/INet/HTTP_StreamPolicyBase.h
/usr/include/ace/INet/INet_Export.h
/usr/include/ace/INet/HTTP_URL.inl
/usr/include/ace/INet/String_IOStream.cpp
/usr/include/ace/INet/AuthenticationBase.h
/usr/include/ace/INet/FTP_IOStream.h
/usr/include/ace/INet/HTTP_ClientRequestHandler.h
/usr/include/ace/INet/HTTP_StreamPolicy.cpp
/usr/include/ace/INet/HTTP_Session.h
/usr/include/ace/INet/HTTP_SessionBase.h
/usr/include/ace/INet/Sock_IOStream.h
/usr/include/ace/INet/FTP_ClientRequestHandler.h
/usr/include/ace/INet/HTTP_URL.h
/usr/include/ace/INet/FTP_Request.h
/usr/include/ace/INet/URLBase.inl
/usr/include/ace/INet/ConnectionCache.inl
/usr/include/ace/INet/FTP_Session.cpp
/usr/include/ace/INet/INet_Log.h