v5.8.1

Improvements:

• <graphQLProtection>: counts nested mutations, now has an example. (@predic8)
• <openapi>: minor improvements, added note to Swagger 2 specifications which were automatically converted to OpenAPI 3.1 .
• Keepalive: check whether socket is closed before trying to reuse a TCP connection (#1576, @idylmz)

Fixes:

• <oauth2Resource2> with <flowInitiator> (B2C): default flow uses wrong token endpoint after initiating but not completing non-default flow (@rrayst)
• Mark HTTP body only as read, if it has been read completely. In some configuration scenarios, this causes HTTP connections to be correctly closed again and/or returned to the pool for reuse.

Dependency upgrades.