v0.11-rc4: Final Release Candidate

Twenty-first release. Here are the changes:

• Updated pl-rt from 1.00-rc1 to 1.03.2
  • I added quite a few more API calls, as well as support for building with Meson
• Updated pl-srv from 0.06 to 0.08.1
  • This update has made pl-srv a true dependency-based init system (making it a true systemd-like init system), and it also added Meson support as well as adding simple service logging
• Updated toybox from 0.8.10 to 0.8.11
  • This added xzcat to the root filesystem
• Updated musl from 1.2.4 to 1.2.5

This will be the last big change to the 0.11 release of PortaLinux. Any more features will be added on a separate branch for the 0.12 release, and will be backported to 0.11 after the final 0.11 update is released. The LLVM script is the last piece remaining to be fully rewritten and it will be finished soon