Change environment variable name.

[quadrupleslap]

For env_logger, maybe keep the default as RUST_LOG and allow the users to change it as a config option? For example, I might want people to use MC_LOG to change the log level of my Minecraft clone.

[xetra11]

Yea that would be nice!
Because I want people who use my library use a library specific env variable to active the logging like "RR_LOG"

[dtolnay]

The workaround for now is:

let mut lb = env_logger::LogBuilder::new();
if let Ok(log_config) = env::var("MC_LOG") {
    lb.parse(&log_config);
}
lb.init()

[sfackler]

env_logger has moved out of tree.