Merge pull request redis#494 from quiver/init-fixes

fix several bugs of init.d scripts

Author: antirez

utils/redis_init_script.tpl

@@ -1,7 +1,7 @@
 
 case "$1" in
     start)
-        if [ -f $$PIDFILE ]
+        if [ -f $PIDFILE ]
         then
                 echo "$PIDFILE exists, process is already running or crashed"
         else