xinitrc: small changes

- sct 3500K
- prefer `if cmd; then ...` to `cmd && ...`
- use different files for stdout and stderr

dotfiles/xinitrc

@@ -10,15 +10,20 @@
 # Dedication along with this software. If not, see
 # <http://creativecommons.org/publicdomain/zero/1.0/>.
 
-[ -r ~/.profile ] && . ~/.profile
+if [ -r ~/.profile ]; then
+	. ~/.profile
+fi
 
-sct 4500
+sct 3500
 
 setxkbmap -layout us -variant altgr-intl -option compose:caps
 xset r rate 300 75
 
 xset b off
 
-[ -r ~/.Xresources ] && xrdb -merge ~/.Xresources
+if [ -r ~/.Xresources ]; then
+	xrdb -merge ~/.Xresources
+fi
 
-exec herbstluftwm -l >~/local/var/log/herbstluftwm 2>&1
+: ${logdir:=~/local/var/log}
+exec herbstluftwm -l >"$logdir/hlwm.out" 2>"$logdir/hlwm.err"