zkey-ekmfweb: Set and get key properties
zkey-ekmfweb: Set and get key properties

Add functions to get and set key properties (i.e. custom tags) of
keys stored in EKMF Web. The key properties are set when the information
associated with a key in the zkey repository is changed, e.g. using the
'zkey change' command.

Signed-off-by: Ingo Franzki <fa8d39f13ae2429c04f0388a0ea18c43b0cb5bf2@linux.ibm.com>
Signed-off-by: Jan Höppner <96138615ab4af0813785fa10d283f3d37eca3b78@linux.ibm.com>

ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools,ibm-s390-tools/s390-tools