Allowed to read from undeclared _PROMPT.
Merge branch 'master' of git://github.com/rosejn/lua-util
Let the warn messages go to stderr.
Support scp protocol

Signed-off-by: Julien Cornebise <julien.cornebise@gmail.com>
Merge pull request #7 from fidlej/topic_warn_to_stderr

Let the warn messages go to stderr
Merge pull request #8 from jucor/scp

Support scp protocol