Experimental libraries (Lua etc.) do not have a tgz package

On Linux we provide download not only of RPM/DEB packages, but also as a binary tar.gz file.

Some of the MaxScale libraries are packaged in a separate RPM named "experimental". Most notably, this includes the Lua library used to create custom query rewrites. These "experimental" libraries are not included in the main tar.gz file for MaxScale we provide and there is no separate "experimental" tar.gz file, so effectively there is no way to obtain them in the case where binary packages and not DEB/RPM are used. This seems like an easy to fix omission, but there are cases when such a tar.gz file is the only way to go (excluding rpm2cpio magic that typically falls outside the skill set fo a common DBA).

Please, provide a separate tar.gz file with these "experimental" libraries (Lua in particular). Also, it would be nice to know when the experimental" status will be dropped and they will be moved to the main package - customers keep asking the question.