[squid-dev] [PATCH] Retry cache peer DNS failures more frequently

[Nathan Hoad]

Hello,

Attached is a patch which makes Squid attempt to resolve failed DNS lookups
for cache peers more frequently than an hour. It's user configurable, with
a default of one minute.

As the patch preamble states, this is necessary for setups where all
traffic is forwarded to a cache peer, as a failed DNS lookup will result in
users being unable to access the web until it is resolved successfully.

I'm not convinced the configuration option (cache_peer_negative_dns_ttl) is
the best name, so I'm happy to take suggestions here.

Thank you,

Nathan.
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