[Bug 3508771] load tclreg.dll in cygwin tclsh
Implement TclWinGetSockOpt, TclWinGetServByName
and TclWinCPUID for Cygwin
fix merge error
merge-mark
	* generic/tclUtil.c (TclDStringToObj): Added internal function to make
	the fairly-common operation of converting a DString into an Obj a more
	efficient one.
fix crash on Mac OSX
fix OSX crash
fix Linux build ;-(
fix Linux build ;-(
Repair more build breakage.
merge trunk
compiler warning
compiler warning
get rid of _ANSI_ARGS_
get rid of _ANSI_ARGS_ and CONST
Make 'auto_execok START' do the Right Thing
Make 'auto_execok START' do the Right Thing
Move CYGWIN-specific stuff from tclPort.h to tclUnixPort.h, where it belongs
Move CYGWIN-specific stuff from tclPort.h to tclUnixPort.h, where it belongs
Compat flag, test, and doc update.
IMPLEMENTATION OF TIP#398 : Quickly Exit with Non-Blocking Blocked Channels