tramp-default-method: heuristic fails if PSSH is present on system

[Ulrich Mueller]

Hi,

tramp-default-method is wrongly set to "pscp" if a binary called
"pscp" (installed by PSSH, http://code.google.com/p/parallel-ssh/) is
found in the path.

This happens both with the tramp version included with Emacs 23.2 and
with Emacs from BZR (as of today), on GNU/Linux.

To distinguish between PuTTY and PSSH, I'd suggest testing for the
"putty" binary (instead, or in addition to pscp). Or, alternatively,
one could test for absence of the "pssh" binary.

Ulrich