It seems that a lot of programs are designed to read these environment variables to decide what proxy to go through in order to connect to a resource on the internet. Those programs may also have their own, individual proxy settings, but if those are not set, they'll happily use these environment variables…
I just want to know:
- Are these environment variables standard?
- Is there a written specification (may be by the OS manufacturers?) that
recommends the use of these environment variables?