PSCP now uses the modern SFTP protocol if it can, and falls back to

scp1 if it can't. Currently not very tested - I checked it in as
soon as it completed a successful recursive copy in both directions.
Also, one known bug: you can't specify a remote wildcard, because by
the nature of SFTP we'll need to implement the wildcard engine on
the client side. I do intend to do this (and use the same wildcard
engine in PSFTP as well) but I haven't got round to it yet.

[originally from svn r1208]

ssh.h

@@ -195,6 +195,13 @@ extern const struct ssh_mac ssh_sha1_buggy;
  */
 extern char sshver[];
 
+/*
+ * Gross hack: pscp will try to start SFTP but fall back to scp1 if
+ * that fails. This variable is the means by which scp.c can reach
+ * into the SSH code and find out which one it got.
+ */
+extern int ssh_fallback_cmd;
+
 #ifndef MSCRYPTOAPI
 void SHATransform(word32 * digest, word32 * data);
 #endif