Corrected some capitalisation issues and changed 'Performance Notes'

to 'Performance Tuning'.

Submitted by: Iikka Meril�inen <Iikka.Merilainen@pato.vaala.fi>

Slightly tweaked the patch to keep 'Sitemap' consistent.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@99074 13f79535-47bb-0310-9956-ffa450edef68