Merge 'taskkill' into HEAD

git-gui/gitk: Do not use a Cygwin-specific kill flag on Windows

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

git-gui/git-gui.sh

@@ -648,9 +648,7 @@ proc kill_file_process {fd} {
 
 	catch {
 		if {[is_Windows]} {
-			# Use a Cygwin-specific flag to allow killing
-			# native Windows processes
-			exec kill -f $process
+			exec taskkill /pid $process
 		} else {
 			exec kill $process
 		}