Test if URLs and domainrecords can be accessed using the API getURL method, e.g. for testing proxy settings in $TYPO3_CONF_VARS[SYS][curlProxyServer] (4.5) or [HTTP][proxy_host] (6.2).
	Automatically tests access to all domain records, or manually entered URLs. Useful for debugging solr FE-indexing or direct_mail page fetching.