session list even if it isn't in the Registry. This got deleted
overenthusiastically because I didn't have a comment explaining what
it was doing there. Now there's a comment, so I probably won't
remove it again.
[originally from svn r733]
- cope with strange WinSock wrappers not supporting SIOCATMARK
- define yet more terminal compatibility modes
- support UK-ASCII (just like US-ASCII but # is a sterling sign)
- support connection keepalives at a configurable interval
[originally from svn r692]
windlg.c into it. Allows plink and pscp to no longer link with
windlg.c, meaning they lose some of the sillier stub functions and
also can provide a console-based form of verify_ssh_host_key().
[originally from svn r683]