[Samba] samba 4.18 RC packages are available for debian and ubuntu

[Michael Tokarev]

I've made available samba 4.18.0~rc1 packages in debian experimental.
Also built this version for debian bullseye and ubuntu jammy, which
are available at http://www.corpit.ru/mjt/packages/samba/ as usual.

Caveat emptor: this is a release candidate, not a release, so use
with caution, at your own risk.

Thanks,

/mjt