The CloseNotifyConn.Close() function calls itself if the closeFlag is equal to 0 which would mean it would immediately swap the closeFlag value to 1 and never call closeFn.  It is unclear what the intent of this call to cc.Close() was but I assume it was meant to be a call to close the Conn object instead.

* config: introduce ExecSource value source

* auth: introduce OidcTokenSourceAuthProvider

* auth: use OidcTokenSourceAuthProvider if tokenSource config is present on the client

* cmd: allow exec token source only if CLI flag was passed

#5105)