correctly escape : for temperatures so FPC temperature works on junos + add safename() function to strip unwanted characters from filenames - should not break anything existing afaik

git-svn-id: http://www.observium.org/svn/observer/trunk@765 61d68cd4-352d-0410-923a-c4978735b2b8

includes/common.php

@@ -74,6 +74,10 @@ function gethostosbyid($id) {
      return $result;
 }
 
+function safename($name) 
+{
+  return preg_replace('/[^a-zA-Z0-9,._\+\()\-]/', '_', $name);
+}
 
 
 ?>