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Make the error message when the CCA library is missing more user friendly. Also display an URL where the CCA package can be downloaded. The CCA library is used for the REENCIPHER commands of zkey and zkey-cryptsetup and must be installed separately as part of the IBM CCA Host Libraries and Tools package. This packages is not provided by the distributors, but must be downloaded from an IBM web page and installed separately. Signed-off-by: Ingo Franzki <ifranzki@linux.ibm.com> Reviewed-by: Harald Freudenberger <freude@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>