liburing update

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io_uring (https://en.wikipedia.org/wiki/Io_uring) is an important
kernel facility, essentially an alternate way of dispatching system
calls more efficiently.  It's used in a lot of high performance
situations.  Although you can talk to it directly, most users should
be using liburing, a C library.

We haven't updated liburing for "a while", since April 2021 to
liburing 2.0.  There have been several upstream versions since then,
the latest is liburing 2.2, released in June.

In theory this version is compatible and uses symbol versions:

$ rpm -q --provides liburing
liburing = 2.2-1.fc38
liburing(x86-64) = 2.2-1.fc38
liburing.so.2()(64bit)
liburing.so.2(LIBURING_2.0)(64bit)
liburing.so.2(LIBURING_2.1)(64bit)
liburing.so.2(LIBURING_2.2)(64bit)

so in theory this is not an ABI break.  In practice I'm told that the
API of liburing is not very stable.

TBH I don't really know how best to test this except to just do it.
The packages that depend on liburing shouldn't have any RPM dependency
problems (I already installed the update on my Rawhide machine), but
it's possible they might break in subtle ways, which is in a way
worse.  They are:

- ceph
- folly
- glusterfs
- plocate
- qemu
- raft
- rocksdb
- root
- samba

(so nothing important!)

I have the update prepared and ready to push to Rawhide, but open to
suggestions if there is a better way to do this.

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
virt-p2v converts physical machines to virtual machines.  Boot with a
live CD or over the network (PXE) and turn machines into KVM guests.
http://libguestfs.org/virt-v2v
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