Version 1.2
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* Fix check for $HOST per @ryanyakich
* Crude support for sed on OSX
* Fix typos
* add --max-allowed-packet option to mysqldump per @bigwilliam
* Add --skip-lock-tables flag

Version 1.1
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* Added checks for external programs
* Additional checks for required variables
* Added escapes with double-quotes
* Filter out performance_schema