hiawatha: add CONFFILES and a php example
hiawatha: add CONFFILES and a php example

- add CONFFILES so that configuration files don't get overwritten
during upgrade
- add an example on how to launch php-cgi using php-fcgi

Signed-off-by: Eric Bénard <96f164ad4d9b2b0dacf8ebee2bb1eeb3aa69adf1@eukrea.com>

WindRiver-OpenSourceLabs/meta-webserver