Catch UnsupportedOperationException for getPosixFilePermissions and default to PRIVATE on non-POSIX systems

src/main/java/org/gaul/s3proxy/nio2blob/AbstractNio2BlobStore.java

@@ -792,6 +792,9 @@ public abstract class AbstractNio2BlobStore extends BaseBlobStore {
         Set<PosixFilePermission> permissions;
         try {
             permissions = Files.getPosixFilePermissions(path);
+        } catch (UnsupportedOperationException uoe) {
+            // Windows/SMB/other non-POSIX: default to PRIVATE
+            return BlobAccess.PRIVATE;
         } catch (IOException ioe) {
             throw new RuntimeException(ioe);
         }