mod_http_oauth2: Bind refresh tokens to client Prevent one OAuth client from using the refresh tokens issued to another client as required by RFC 6819 section 5.2.2.2 See also draft-ietf-oauth-security-topics-22 section 2.2.2 Thanks to OAuch for pointing out this issue

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summary: Extra verbose stanza logging
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Summary
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This module logs the full stanzas that are sent and received into debug
logs, for debugging purposes.