lib/azure_blob_req: add acc path prefix when not in host
lib/azure_blob_req: add acc path prefix when not in host

Normally the Azure account is provided as a prefix to the server
hostname. For emulated servers it needs to be included as a prefix to
the path, just like S3.

Signed-off-by: David Disseldorp <589a549dc9f982d9f46aeeb82a09ab6d87ccf1d8@suse.de>

ddiss/elasto,ddiss/elasto