qemu-img: Add print_amend_option_help()
The more generic print_block_option_help() function is not really suitable for qemu-img amend, for a couple of reasons: (1) We do not need to append the protocol-level options, as amendment happens only on one node and does not descend downwards to its children. (2) print_block_option_help() says those options are "supported". For option amendment, we do not really know that. So this new function explicitly says that those options are the creation options, and not all of them may be supported. (3) If the driver does not support option amendment, we should not print anything (except for an error message that amendment is not supported). Buglink: https://bugzilla.redhat.com/show_bug.cgi?id=1537956Signed-off-by: NMax Reitz <mreitz@redhat.com> Reviewed-by: NJohn Snow <jsnow@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Message-id: 20180509210023.20283-5-mreitz@redhat.com Signed-off-by: NMax Reitz <mreitz@redhat.com>
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