Windows and Mac backends have acquired auth-finding functions which
do nothing; Unix backend has acquired one which actually works, so
Plink can now do X forwarding believably.
(This checkin stretches into some unlikely parts of the code because
there have been one or two knock-on effects involving `const'. Bah.)
[originally from svn r2536]
The current pty.c backend is temporarily a loopback device for
terminal emulator testing, the display handling is only just enough
to show that terminal.c is functioning, the keyboard handling is
laughable, and most features are absent. Next step: bring output and
input up to a plausibly working state, and put a real pty on the
back to create a vaguely usable prototype. Oh, and a scrollbar would
be nice too.
In _theory_ the Windows builds should still work fine after this...
[originally from svn r2010]
load a key that is already loaded. This makes command lines such as
`pageant mykey -c mycommand' almost infinitely more useful.
[originally from svn r1522]
malicious SCP server could have written to areas other than the ones
the user requested; cleared up buffer overruns everywhere. Hopefully
we now do not use arbitrary buffer limits _anywhere_.
[originally from svn r1205]
by ceasing to listen on input channels if the corresponding output
channel isn't accepting data. Has had basic check-I-didn't-actually-
break-anything-too-badly testing, but hasn't been genuinely tested
in stress conditions (because concocting stress conditions is non-
trivial).
[originally from svn r1198]
