Fixed the bitwise flag comparison in ProtectionMatches() which failed to yield a boolean result. This resulted in unanticipated [obj info methods -callprotection] behaviour, with the -callprotection filter seemingly being ignored. Added some tests to tests/info-method.tcl.
- fixed handling of TclNRRunCallbacks, such that coroutines can be easily used (more testing required) - added temporary routine ::nsf::yieldcheck for coro debugging - renamed Tcl85showStack() to TclShowStack()