RHGitaly repositories root and listen address specifications
Up to now, RHGitaly has gotten its two necessary parameters for operation, the root of repositories and the address to bind to from environment variables (mostly because it was 0-cost and good enough).
It is time to provide CLI options, while keeping backwards compatibility (the env
feature of clap
is meant for this). Also, reading from Mercurial config would be a plus (avoid duplication with HGitaly configuration).