HPN-SSH 18.7.0

This release incorporates OpenSSH 10.0p1 into HPN-SSH. This release also includes support for Multi-Path TCP (MPTCP) as a runtime option for HPN-SSH. MPTCP is available only on Linux and Mac OSX operating systems. Using MPTCP on a system that doesn't support it will result in a notice and failure. The use cases for MPTCP include seamless handovers when changing networks and aggregating multiple interfaces to improve available bandwidth. This should be considered somewhat experimental at this time and I want to encourage people to let me know if they run into any issues, have comments, or suggestions.

To use MPTCP use the command line option -oUseMPTCP=yes. The default value is no.