Should fix issue with v4 transactions where these aren't used. Matches with the NOT NULL DEFAULT 0 which automatically transitions existing v4 ARBITRARY transactions to use the same defaults.
This allows node operators to return their authentication to the legacy rules (local requests allowed), without introducing javascript vulnerabilities. The websites, apps, etc are just prevented from loading, to avoid the risk of any API calls from javascript.
The modifications made to these methods were causing issues with other transaction types that were expecting blank strings instead of null. To keep risk to a minimum, I have split into two different sets of functions until there is more time to unify them.
1) Each relay request expires after 5 seconds, after which nodes will stop relaying it, preventing any kind of infinite loop. So it has to reach the destination peer within 5 seconds. This should be fine, because the original peer's request would timeout anyway, so there's nothing to be gained by continuing to relay it.
2) Each relay request stops being forwarded after 3 "hops" - i.e. once it has been relayed through 3 different peers, it will no longer be transmitted any further. If we assume that each node has 16 connections, that allows it to reach a theoretical maximum of 4096 peers in 3 hops. In practice it will be less, and may not reach everyone due to peer "islands". But it will automatically retry a few times on a timer, so should hopefully find what it needs eventually. Plus, it still has the ability to make a direct connection to anyone hosting the data, as long as they are port forwarded.
This is likely longer than needed, but it's best to allow extra for now and then optimize the timeouts once we've had some experience with real world data.
This involves modifying the log4j2.properties file on node startup to fix an incompatibility with ${dirname:-}. Thanks to AlphaX Projects for tracking down this incompatibility.
This allows an entire registered name to be preauthorized, therefore allowing for instance a website to automatically request other resources from the same author, such as videos.
This delegates the task to the browser rather than doing it in java. It should also catch a few remaining types of links that we had missed - e.g. ones that originate from within js files.
