Summarized Changelog:

• A regression introduced in 2.1.0 caused the jack audio driver to not correct a sample-rate mismatch.
• Fix various typos in the documentation.
• Fix a memory leak in the file renderer.
• Fix leaking memory when sequencer clients were not explicitly unregistered.
• Fix a heap-based use-after-free in jack driver.

• Connected using jack2 (could not get jack1 to work after the alsa update) to qsynth and played sounds using my midi keyboard.