Ferrocene released as open source

Ferrous Systems has https://ferrous-systems.com/blog/ferrocene-open-source/

that its Ferrocene Rust compiler will be released under the Apache-2.0 and
MIT licenses.


	Ferrocene is the main Rust compiler - rustc - but quality managed
	and qualified for use in automotive and industrial environments
	(currently by ISO 26262 and IEC 61508) by Ferrous Systems. It
	operates as a downstream to the Rust project, further increasing
	its testing and quality on specific platforms.


The license is free, but this is not being run as an open-source project;
specifically, contributions from the "general public" are not accepted.

https://lwn.net/Articles/946732/