…Ls in ADC files

Removes URL validation for token_url, service_account_impersonation_url to allow for TPC urls and adds line to the docs to warn users. See googleapis/google-auth-library-nodejs#1517 for same change in node.js library.

Change-Id: I85fa67ee0b99deed2adb75668a1b5501851c499c
GitHub-Last-Rev: 15d7759
GitHub-Pull-Request: #627
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/465696
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Change-Id: Ie2d972df025f6b6b7d172015aae7eb34e355cb28
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/412034
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With Context Aware Access enabled, users must use the endpoint "https://oauth2.mtls.googleapis.com/token" for token exchange. This PR adds support for runtime configuration of the OAuth2 token endpoint (as determined by the caller). If using the mTLS oauth2 endpoint, the caller will also need to specify an mTLS-enabled HTTPClient via the "context" mechanism for use by the OAuth2 transport.

Change-Id: Ic83342ec1d224d3acdabf00d863249330424fc54
GitHub-Last-Rev: 07e4849
GitHub-Pull-Request: #630
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/470396
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Reviewed-by: Shin Fan <shinfan@google.com>
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Reviewed-by: Andy Zhao <andyzhao@google.com>
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Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: If7957dff90ca75fa8fd84ace90ed15066bfd3e48
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/473438
Reviewed-by: Heschi Kreinick <heschi@google.com>
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Text verbatim from https://go.dev/doc/contribute

Change-Id: Iefdcf9e9f771b9e55601bf9c9b59e20593b4573a
GitHub-Last-Rev: ba45caa
GitHub-Pull-Request: #632
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Update the URL to a newer page that better describes how to set
up credentials in different environments.

Change-Id: Ic0726fe298c543265d333cda60d62c235e4e2293
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/473735
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Fixing dead links in workload docs, adds workforce documentation

Change-Id: Ifad86e1937997f96ef577f5469d1e6fe496197b5
GitHub-Last-Rev: af28808
GitHub-Pull-Request: #638
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/478555
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Change-Id: I515f8897cc79c58a8a49df84ccddc5acd9536d87
GitHub-Last-Rev: 5acbebb
GitHub-Pull-Request: #616
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/459695
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Add a constructor which allows for the configuration of the expiryDelta
buffer. Due to the construction of reuseTokenSource and Token we need
to store the new delta in both places, so the behavior of Valid is
consistent regardless of where it is called from.

Fixes #623

Change-Id: I89f9c206a9cc16bb473b8c619605c8410a82fff0
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/479676
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This option is a followup to to cl/479676 where an option was added
to configure the preemptive token refresh. Currently the option
in this package is only being used by compute credentials. In the
future we can support more/all auth flows but that would require
a lot of new surfaces to be added. Compute credentials are currently
the only case where we are expirencing the need to configure this
setting.

Change-Id: Ib78ca4beec44d0fe030ae81e84c8fcc4924793ba
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/479956
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Update golang.org/x dependencies to their latest tagged versions.
Once this CL is submitted, and post-submit testing succeeds on all
first-class ports across all supported Go versions, this repository
will be tagged with its next minor version.

Change-Id: If1689e1b37e36e8e8dd1cfc37fe9cb94bd49c807
Reviewed-on: https://go-review.googlesource.com/c/oauth2/+/482856
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Reviewed-by: Carlos Amedee <carlos@golang.org>
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