inherit ssl.* from global scope if $SERVER["socket"] contains
ssl.engine = "enable" and no other ssl.* settings
(In earlier versions of lighttpd, specifying ssl.engine = "enable"
without specifying ssl.pemfile was a configuration error, so this
change should not break any pre-existing and previously working
re-patch mod_openssl config within the request so that per-request
settings can be applied, such as activating client cert verification
for specific URL paths.
(This can be used in conjunction with auth.backend = "extern"
to require auth to occur)
"SSL : authenticate only clients for a particular URL"