Merge branch 'ml/tcltk-9'

* ml/tcltk-9: gitk: allow Tcl/Tk 9.0+ gitk: use -profile tcl8 on encoding conversions gitk: use -profile tcl8 for file input with Tcl 9 gitk: Tcl9 doesn't expand ~, use $env(HOME) gitk: switch to -translation binary gitk: update scrolling for TclTk 8.7+ / TIP 474 Signed-off-by: Johannes Sixt <j6t@kdbg.org>