[Rpm-maint] RPM 4.15.1 released!

[Panu Matilainen]

This is first and foremost a critical bugfix release to address some 
regressions introduced in 4.15.0 and a few other important bugs in that 
release. This would've been called 4.15.0.1 if it wasn't for one thing: 
a new (optional) libgcrypt crypto backend, which is good news for those 
who were stuck between openssl license and the NSS mammoth.

As usual, details and download info in the release notes:

	https://rpm.org/wiki/Releases/4.15.1

On behalf of the rpm-team, thanks to all the people who contributed to 
make this possible.

     - Panu -