rest: add cache/list

Add GET cache/list request to obtain information about the client's
cache.

Resquest payload structure:
{
    'clients': ['10.141.10.21', '10.141.10.22']
}

Response's structure:
{
    'clients': [
        {
            'ip': '10.141.10.21',
            'cache_size': 2894572304857,
            'images': [
                {name:'img1', size: 87283902343, checksum: '5d4dcc677bc19f40a647d0002f4ade90'},
                {name:'img2', size: 894572304857, checksum: '3eb22f888f88a55ad954f55644e1192e'}
            ]
        },
        {
            'ip': '10.141.10.22',
            'cache_size': 49872839023434,
            'images': [
                {name:'img2', size: 894572304857, checksum: '3eb22f888f88a55ad954f55644e1192e'}
            ]
        }
    ]
}

Both 'cache_size' and the values in 'image_sizes' are provided
as bytes.

If a client has no cache partition the payload will include it as:
...
	{
            'ip': '10.141.10.22',
            'cache_size': 0,
            'images': []
        }
...

1 files changed, 1 insertions, 0 deletions

diff --git a/src/rest.h b/src/rest.h
index e2e22ae..fbe0e43 100644
--- a/src/rest.h
+++ b/src/rest.h
@@ -116,6 +116,7 @@ enum og_rest_uri {
 	OG_URI_IMAGE_UPDATE,
 	OG_URI_IMAGE_RESTORE,
 	OG_URI_IMAGE_DELETE,
+	OG_URI_CACHE_LIST,
 	OG_URI_PART_SETUP,
 	OG_URI_RUN_SCHEDULE,
 	OG_URI_TASK_RUN,