Disable default caching for discovery

[brockallen]

No description provided.

[brockallen]

fixed

[laurynasr]

Why was this change done?
At least the doc comments still say that it defaults to one hour:

IdentityServer4/src/IdentityServer4/Configuration/DependencyInjection/Options/DiscoveryOptions.cs

Line 70 in e130df9

/// Sets the maxage value of the cache control header (in seconds) of the HTTP response. This gives clients a hint how often they should refresh their cached copy of the discovery document (defaults to one hour).

[brockallen]

The change was done because once you go to production you are expected to choose these values (not us). Also, if you don't know about the value and it's set by default then you might have unexpected behavior in prod.

[lock]

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