* net/tramp.el (tramp-remote-process-environment): Set "LC_ALL=C".

* net/tramp.el (tramp-remote-process-environment): Set "LC_ALL=C".
(tramp-end-of-output): Add `tramp-rsh-end-of-line' into the
regexp.
(tramp-find-shell, tramp-open-connection-setup-interactive-shell):
Don't send `tramp-rsh-end-of-line' additionally, when setting the
prompt.
(tramp-wait-for-output): Distinguish different prompt formats.
(tramp-get-test-nt-command): Don't check for "\n" in the prompt.
(tramp-local-host-p): Check whether temp directory is writable.