Some quoting fixes/improvements.

support/lsh

@@ -13,7 +13,7 @@ do_cd=y # Default path is user's home dir, just like ssh.
 while : ; do
     case "$1" in
     -l) user="$2"; shift; shift ;;
-    -l*) user=`echo $1 | sed 's/^-l//'`; shift ;;
+    -l*) user=`echo "$1" | sed 's/^-l//'`; shift ;;
     --no-cd) do_cd=n; shift ;;
     -*) shift ;;
     localhost) shift; break ;;
@@ -22,9 +22,9 @@ while : ; do
 done
 
 if [ "$user" ]; then
-    prefix="sudo -H -u $user"
+    prefix="sudo -H -u '$user'"
     if [ $do_cd = y ]; then
-	home=`perl -e "print((getpwnam("$user"))[7])"`
+	home=`perl -e "print((getpwnam('$user'))[7])"`
 	# Yeah, this may fail, but attempts to get sudo to cd are harder.
 	cd $home
     fi