bpfman-operator/agent and Egress Proxy Support

[frobware]

In clusters using an egress proxy, it is crucial to ensure that bpfman-operator and bpfman-agent respect the http_proxy and no_proxy environment variables. This will determine whether these components can successfully communicate through the proxy.

At https://curl.haxx.se/docs/manual.html there's description of environment variables related to using HTTP proxy which libcurl/curl understands:

ENVIRONMENT VARIABLES

Curl reads and understands the following environment variables:
http_proxy, HTTPS_PROXY, FTP_PROXY

They should be set for protocol-specific proxies. General proxy should be set with
ALL_PROXY

A comma-separated list of host names that shouldn't go through any proxy is set in (only an asterisk, '*' matches all hosts)
NO_PROXY

If the host name matches one of these strings, or the host is within the domain of one of these strings, transactions with that node will not be proxied.

Please notice that http_proxy is spelled lowercase as the only one among these variables. Some libraries/programs look for lowercase names of these variables whereas others look for upppercase names. To be safe one should define both lowercase and uppercase versions of each variable.