2974459,2879351,1951574,1852572,1661378,1613456 Revisions to the NativeAccess()
routine that queries file permissions on Windows native filesystems.  Meant to
fix numerous bugs where [file writable|readable|executable] "lies" about what
operations are possible, especially when the file resides on a Samba share.
Patch merged from the fix-win-native-access branch.
[Frq 3464401] Support Unicode 6.1
mingw doesn't have LABEL_SECURITY_INFORMATION definition
Fix for [Bug 3484621]: insure that execution traces on bytecoded commands
bump the interp's compile epoch.
fix for [Bug 3484621], take 2
fix for [Bug 3484621], take 3
3485022 TclCompileEnsemble() avoid compile when exec traces set.
3485022 Disable ensemble subcommand compile inside a Tcl_Create*Trace().
3484402 Correct Off-By-One error appending unicode. Thanks to Poor Yorick.
Also corrected test for when growth is needed.
Document, by a retroactive bug report, a nasty Notifier issue on 64-bits x86 that affects the 8.4 branch
optimizing / bug fixing of clock.tcl
	* generic/tclCompCmds.c (TclCompileDictForCmd): [Bug 3487626]: Fix
	crash in compilation of [dict for] when its implementation command is
	used directly rather than through the ensemble.
merge bugfix