When configuring iocaine via environment variables, sections and
settings were separated by two underlines, but the `IOCAINE_` prefix
only had one. This felt weird, so now iocaine supports an `IOCAINE__`
prefix too, and keeps recognizing the old one too.
Documentation and examples updated to use the new naming. No mention of
the backwards compatibility - I'll just silently support that.
Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>
This adds plenty of documentation: describing what iocaine is, how it
does what it does, and how to deploy it in various scenarios.
Not complete yet, but reasonably detailed nevertheless.
Signed-off-by: Gergely Nagy <me@gergo.csillger.hu>
