Check-in [e2821cfbab]

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# TIP 532: Re-implementation of event loop processing.
	Author:         Gregor Cramer <[email protected]>
	State:          Final
	Type:           Project
	Vote:           Pending
	Created:        09-Jan-2019
	Post-History:  
	Keywords:       Tk, bind, event, event loop
	Tcl-Version:    8.6
	Tk-Branch:      bug6e8afe516d
----

# Abstract

Current implementation of event loop processing suffers from a limited event ring.
This limitation is causing unexpected behavior. Moreover some issues in event loop