RPM 4.19.0 ALPHA2 released!

[dmnks]

This is a bug fix update to address a couple of issues found by the early adopters of ALPHA1, mostly related to some bits and pieces missed during the CMake transition.

Commits applied since ALPHA1:

* Have dist (and snapshot) targets automatically pull in the po submodule
* Add pgpVerifySignature2() and pgpPrtParams2()
* Remove second share/ dir from infodir and mandir
* Fix bzip2 detection
* Test for the variable rather than it's expansion in cmake files
* Enable large file support on 32-bit systems again
* Use mkdir -p for creating SPECPARTS dir
* Fix undefined symbols from plugins in some circumstances
* Revert %_smp_build_ncpus change to a parametric macro (RhBug:2210347)
* Move dbus announce plugin config to DATADIR

Details and download info at https://rpm.org/wiki/Releases/4.19.0