Only HTTP proxies are supported.
The proxy address must start with http://, and can only contain a host and a port.
If a port is omitted, it defaults to port 80.
Hosts to which all connections should bypass a proxy.
Values can be either hostnames, or IP addresses.
IP addresses can optionally be provided using
CIDR notation.
The value "*" is a wildcard that disables proxying for all hosts.
A hostname matches all subdomains.
For example, example.com matches foo.example.com, but not fooexample.com.
A hostname that is prefixed with a dot matches the hostname itself,
so .example.com matches example.com.
Hostnames do not match their resolved IP addresses.
For example, the hostname localhost will not match 127.0.0.1.
Optionally, a port can be specified.
If a port is omitted, all ports are matched.
Settings that control how Pkl talks to HTTP proxies.