remove dots from the pool name, because these cause no pool names are di...

remove dots from the poolname, because these cause no poolnames are displayed (No .label provided); sorry for bad english ;)
![php_fpm_time-day](https://f.cloud.github.com/assets/5057695/1707973/285d77f2-6106-11e3-87b4-649cc2b758ad.png)