Is there any interest in implementing agent forwarding functionality in libssh2? At one point a patch was submitted (https://www.libssh2.org/mail/libssh2-devel-archive-2012-03/0114.shtml) but it looks like it wasn't merged in (https://www.libssh2.org/mail/libssh2-devel-archive-2012-03/0121.shtml).