[Libguestfs] [PATCH libnbd 0/5] info: --map: Coalesce adjacent extents of the same type.

[Richard W.M. Jones]

This adds coalescing of adjacent extents of the same type, as
mentioned by Eric Blake in the commit message here:

https://github.com/libguestfs/libnbd/commit/46072f6611f80245846a445766da071e457b00cd

The patch series is rather long because it detours through adding the
<vector.h> library from nbdkit into libnbd and replacing ad hoc uses
of realloc, char ** etc in various places.

Rich.