Initial work on SF FRQ #3567063.
Free the WinThread structure before running the original thread procedure.
Make compilation of the fp control changes possible with MinGW.
When checking for std channels being closed, compare the channel state,
not the channel itself so that stacked channels do not cause trouble.
merge 8.4
experimental implementation of FRQ-3579001
syntax improvement: expect options before the filename
<p>start at documentation
merge trunk
Finish the TIP #416 implementation as specified (#define's were still missing). Added warning to "load" documentation. Added test case for using -global without specifying filename.
merge trunk
Flag USE_TCLOO_STUBS is not necessary any more for extensions: Stubs are the only way to access TclOO, so it is implied.
merge mark
ChangeLog release mark
merge trunk
re-enable bcc-tailcall, after fixing an infinite loop in the TCL_COMPILE_DEBUG mode
added forgotten Changelog entry
merge trunk
style fix
merge trunk. 
<p>doc fix
merge release to 8.5