change example 'servername' in sample config. the database column is a CHAR(3), so using the old example broke the queries

Author: lopezio

xhprof_lib/config.sample.php

@@ -8,7 +8,7 @@
 $_xhprof['dbpass'] = 'password';
 $_xhprof['dbname'] = 'xhprof';
 $_xhprof['dbadapter'] = 'Pdo';
-$_xhprof['servername'] = 'myserver';
+$_xhprof['servername'] = 's01';
 $_xhprof['namespace'] = 'myapp';
 $_xhprof['url'] = 'http://url/to/xhprof/xhprof_html';
 $_xhprof['getparam'] = "_profile";