Revert "Add description of SQL CLI and HiveServer."

This reverts commit 58094965a090f9dfd9271b2183f57c1d03e31d62.
Revert "Revert "Add description of SQL CLI and HiveServer.""

This reverts commit ef2df8a3f823572740a660a8ecf78a86c90918b2.
Revert "Revert "Revert "Add description of SQL CLI and HiveServer."""

This reverts commit 701f41c90a76084a64c99ba608793b9899769eaf.
Revert "Merge branch 'master' of https://github.com/apache/spark"

This reverts commit c577589e93441e2fa3577e92007b7def546c9d9e, reversing
changes made to 58094965a090f9dfd9271b2183f57c1d03e31d62.

Conflicts:
	sql/README.md
	new file:   sql/hive/src/test/resources/golden/case sensitivity
commit
	deleted:    sql/README.md
	new file:   sql/README.md