R help - Oct 2023 - download.file strict certificate revocation check

What/how do I interact with the download.file with turning off the strict
certificate revocation check in regards to download & update packages?
I clearly made an attempt at this, but failed miserably.

Trying to do this, reference FAQ-
2.18 The Internet download functions fail.
(c) A MITM proxy (typically in enterprise environments) makes it impossible to
validate that certificates haven't been revoked. One can switch to only best
effort revocation checks via an environment variable: see ?download.file.
Confidentiality Notice - This communication and any atta...{{dropped:10}}

? Wed, 4 Oct 2023 13:09:47 +0000
John Neset <John.Neset at noridian.com> ?????:
> Trying to do this, reference FAQ-
> 2.18 The Internet download functions fail.
> (c) A MITM proxy (typically in enterprise environments) makes it
> impossible to validate that certificates haven't been revoked. One
> can switch to only best effort revocation checks via an environment
> variable: see ?download.file.
Here's what help(download.file) has to say:
>>     On Windows with ?method = "libcurl"?, when R was linked
with
>>     ?libcurl? with ?Schannel? enabled, the connection fails if it
>>     cannot be established that the certificate has not been revoked.
>>     Some MITM proxies present particularly in corporate environments
>>     do not work with this behavior. It can be changed by setting
>>     environment variable ?R_LIBCURL_SSL_REVOKE_BEST_EFFORT? to
>>     ?TRUE?, with the consequence of reducing security.
Does it help to Sys.setenv(...) this environment variable before
downloading? If not, please provide your sessionInfo() and the full
error message.

-- 
Best regards,
Ivan