[mod_simple_vhost] use config_plugin_values_init()
[mod_simple_vhost] use config_plugin_values_init()

replace caching with one-element cache of last directory root

stat_cache is a cache and will handle additional caching, as configured

gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,lighttpd/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4,gstrauss/lighttpd1.4