Inconsistent comments in INI files

There is minor inconsistency with comment handling in INI file:
```
dir1 = "I have commentsPost(c1)" ; c1
dir2 = I have no comments ; c2
dir3 = I have commentsPre(c2) from previous line
```

library/Icinga/File/Ini/IniParser.php

@@ -153,7 +153,7 @@ class IniParser
                             $state = self::LINE_START;
                             $line ++;
                         } elseif ($s === ';') {
-                            $state = self::COMMENT;
+                            $state = self::COMMENT_END;
                         }
                     } else {
                         $token .= $s;