[vty] Allow to create a buffer in a given context.
Stop using the global vty context for all allocations
and allow to embed the buffer into a given context, and
allocate sub buffers with the context of its parent.
diff --git a/openbsc/include/vty/buffer.h b/openbsc/include/vty/buffer.h
index 3151940..c9467a9 100644
--- a/openbsc/include/vty/buffer.h
+++ b/openbsc/include/vty/buffer.h
@@ -28,7 +28,7 @@
/* Create a new buffer. Memory will be allocated in chunks of the given
size. If the argument is 0, the library will supply a reasonable
default size suitable for buffering socket I/O. */
-struct buffer *buffer_new(size_t);
+struct buffer *buffer_new(void *ctx, size_t);
/* Free all data in the buffer. */
void buffer_reset(struct buffer *);