[SPARK-9254] [BUILD] [HOTFIX] sbt-launch-lib.bash should support HTTP/HTTPS redirection#7597

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liancheng wants to merge 2 commits intoapache:masterfrom

liancheng:spark-9254

Commits on Jul 22, 2015

Supports HTTP/HTTPS redirection
liancheng
committed
Uses `--fail' to make curl return non-zero value and remove garbage output when the download fails
liancheng
committed