Manuel Bleichenbacher 1e4736f9b3 Prevent double-escaping of authorize URL parameters
If the authorization URL in the OAuth2 provider configuration contained query parameters with escaped characters, these characters were escaped a second time. This commit fixes it.

It is relevant to support the OIDC claims parameter (see https://openid.net/specs/openid-connect-core-1_0.html#ClaimsParameter).

Fixes gh-7871
2020-02-08 16:59:01 -05:00
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