/usr/include/ace/INet/ is in libace-inet-ssl-dev 6.3.3+dfsg-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ace/INet/HTTPS_Context.h
/usr/include/ace/INet/HTTPS_Context.inl
/usr/include/ace/INet/HTTPS_Session.cpp
/usr/include/ace/INet/HTTPS_Session.h
/usr/include/ace/INet/HTTPS_SessionFactory.h
/usr/include/ace/INet/HTTPS_URL.h
/usr/include/ace/INet/HTTPS_URL.inl
/usr/include/ace/INet/INet_SSL_Export.h
/usr/include/ace/INet/SSLSock_IOStream.cpp
/usr/include/ace/INet/SSLSock_IOStream.h
/usr/include/ace/INet/SSL_CallbackManager.h
/usr/include/ace/INet/SSL_CallbackManager.inl
/usr/include/ace/INet/SSL_CertificateCallback.h
/usr/include/ace/INet/SSL_CertificateCallback.inl
/usr/include/ace/INet/SSL_PasswordCallback.h
/usr/include/ace/INet/SSL_Proxy_Connector.h
/usr/include/ace/INet/SSL_X509Cert.h
/usr/include/ace/INet/SSL_X509Cert.inl