* core: avoid dangerous use of CGI->param in list context, which led
to a security flaw in Bugzilla; as far as we can tell, ikiwiki
is not vulnerable to a similar attack, but it's best to be safe
* core: new reverse_proxy option prevents ikiwiki from trying to detect
how to make self-referential URLs by using the CGI environment variables,
for instance when it's deployed behind a HTTP reverse proxy
* core: avoid dangerous use of CGI->param in list context, which led
to a security flaw in Bugzilla; as far as we can tell, ikiwiki
is not vulnerable to a similar attack, but it's best to be safe
* core: new reverse_proxy option prevents ikiwiki from trying to detect
how to make self-referential URLs by using the CGI environment variables,
for instance when it's deployed behind a HTTP reverse proxy