- Split the sle condition again for exact features to allow their
override

- Enable smartcards on sle15 as the supportlib is available
* Condition it using name everywhere instead of suse versions
and join together with lz4
- Format with spec-cleaner
- Convert dependencies to pkgconfig style
- Install documentation and license file
- Add configure arguments to most of the options to not rely on
autotools automatic behavior
* Also enable gstreamer and lz4 options
- Drop the not needed python dependencies, they are needed only
when building from git snapshot