Sftp support#1

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dtiedy wants to merge 4 commits intojjensen:masterfrom

dtiedy:sftp_support

Commits on Aug 27, 2012

Added SSH support to curl (sftp)
dtiedy
committed
Added a few curl options to luacURL
dtiedy
committed
Added some ssh options to luaCurl
dtiedy
committed

Commits on Sep 4, 2012

changed to curl 7.27.0
dtiedy
committed