/usr/include/vmime/net/tls/ is in libvmime-dev 0.9.2-5build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/vmime/net/tls/TLSProperties.hpp
/usr/include/vmime/net/tls/TLSSecuredConnectionInfos.hpp
/usr/include/vmime/net/tls/TLSSession.hpp
/usr/include/vmime/net/tls/TLSSocket.hpp
/usr/include/vmime/net/tls/gnutls/
/usr/include/vmime/net/tls/gnutls/TLSProperties_GnuTLS.hpp
/usr/include/vmime/net/tls/gnutls/TLSSession_GnuTLS.hpp
/usr/include/vmime/net/tls/gnutls/TLSSocket_GnuTLS.hpp
/usr/include/vmime/net/tls/openssl/
/usr/include/vmime/net/tls/openssl/OpenSSLInitializer.hpp
/usr/include/vmime/net/tls/openssl/TLSProperties_OpenSSL.hpp
/usr/include/vmime/net/tls/openssl/TLSSession_OpenSSL.hpp
/usr/include/vmime/net/tls/openssl/TLSSocket_OpenSSL.hpp