Revert "Additional SYSV init script fixes."

This reverts commit 036391c980.

Because #3509 came just after this commit was accepted and is related
to the original problem the commit was supposed to fix, we need to
solve the problem in another way.

Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>

etc/init.d/zfs-functions.in

@@ -371,16 +371,13 @@ read_mtab()
 	# Unset all MTAB_* variables
 	unset $(env | grep ^MTAB_ | sed 's,=.*,,')
 
-	mount | \
-	    grep -E "$match" | \
-	    sed "s,\(.*\) on \(.*\) type .*,\1;\2," | \
-	    while read line; do
-		mntpnt=$(echo "$line" | sed -e 's,;.*,,' -e 's,/,_,g' \
-		    -e 's,-,_,g' -e 's,\.,_,g' -e 's, ,_,g')
-		fs=$(echo "$line" | sed 's,.*;,,')
-
-		eval export MTAB_$mntpnt="'$fs'"
-	done
+	while read -r fs mntpnt fstype opts rest; do
+		if echo "$fs $mntpnt $fstype $opts" | grep -qE "$match"; then
+			mntpnt=$(printf '%b\n' "$mntpnt" | sed -e 's,/,_,g' \
+			    -e 's,-,_,g' -e 's,\.,_,g')
+			eval export MTAB_$mntpnt="$fs"
+		fi
+	done < /proc/mounts
 }
 
 in_mtab()