Service discovery confused by newlines within meta or link tags

The preg_match() regexes in openid.inc will not span any newlines within the tags e.g:

<meta http-equiv="X-XRDS-Location"
content="http://www.myopenid.com/xrds?username=jpstacey.myopenid.com" />

will fail, because of the newline before the content attribute. Please find attached a simple patch to fix these with the "s" switch on the regexes.

(As an aside: my OpenID has been working fine previously without that X-XRDS-Location header. Is that an OpenID2 thing? Because I don't think e.g. AOL supports it: see this howto. Is there any fallback for using just the openid.delegate and openid.server links, as my OpenID didn't work with just those in the HTML?)