revert [273bbe926d]:  it doesn't work on i386
new version of cpuid, which doesn't use the edi register any more. Hopefully that works better on some Darwin.
[Bug 3601804]: platformCPUID segmentation fault on Darwin
(::platform::LibcVersion): See [Bug 3599098]: Fixed the RE extracting
the version to avoid issues with recent changes to the glibc
banner. Now targeting a less variable part of the string. Bumped
package to version 1.0.11.
Fix for Bug 3603434.
[Bug 3603434] Make sure TclpObjNormalizePath() properly declares "a:/" to
be normalized, even when no "A:" drive is present on the system.
Backport various improvements from Tcl 8.5
Add some extra paths on Windows for fincing tclConfig.sh, for mSys and Cygwin shell.
New branch bug-3604074 with improved patch to correct fixempties() failure
to converge.
3604074 Fix regexp optimization to stop hanging on the expression
((((((((a)*)*)*)*)*)*)*)* .  Thanks to Bjørn Grathwohl for discovery.
revise test numbering for forward merging
Add test-case for Bug #2438181 (which passes in Tcl 8.4 but fails in 8.5/8.6).
Provided by Poor Yorick
36054447 Convert [namespace export -clear] interface to something less stupid.
Test suite does not demand the stupidity continue, thank goodness.
refinement
The flag TCL_LEAVE_ERR_MSG has no effect on the routine
TclGetNamespaceForQualName() so for goodness sake stop making any
special efforts to add it in when making calls.
added test