HEX WITH --HEX-BLOB OPTION

ISSUE :
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If mysqldump is executed with --hex-blob option, all the
blob type data should be converted to hex value. The
geometry data are also blob, and their values should be
dumped in hexadecimal form. But mysqldump dumps geometry
data in binary form.

Fix :
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If value being dumped is of geometry type and --hex-blob is
set then mysqldump will dump such values in hexadecimal form.