mysql: explicit specify --pid-file in rc script

mysql/.md5sum

@@ -1,3 +1,3 @@
 1622e62c80d128f1951a12c0125d3fb5  my.cnf
 7754df40bb5567b03b041ccb6b5ddffa  mysql-5.6.27.tar.gz
-5ce1297ee84c95df59260707f0ec44c3  mysqld
+4f3967b521f810a0a9d7daa9c81bc85d  mysqld

mysql/mysqld

@@ -8,10 +8,11 @@ PROG=/usr/sbin/mysqld
 MYSQL_CFG=/etc/my.cnf
 PID=/var/run/mysql/mysqld.pid
 LOG=/var/log/mysqld.log
+OPTS="--pid-file=$PID"
 
 case $1 in
 start)
-	$SSD --start -bC --pidfile $PID --exec $PROG >> $LOG 2>&1
+	$SSD --start -bC --pidfile $PID --exec $PROG -- $OPTS >> $LOG 2>&1
 	;;
 stop)
 	$SSD --stop --remove-pidfile --retry 10 --pidfile $PID