Fixed: Regex in log cleanser taking 10+ minutes on messages longer than 100k.

(cherry picked from commit d01bae92bfd68b04c54ab19bafe8af16c68ce711)

src/NzbDrone.Common/Instrumentation/CleanseLogMessage.cs

@@ -18,7 +18,7 @@ namespace NzbDrone.Common.Instrumentation
                 new Regex(@"iptorrents\.com/[/a-z0-9?&;]*?(?:[?&;](u|tp)=(?<secret>[^&=;]+?))+(?= |;|&|$)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
                 new Regex(@"/fetch/[a-z0-9]{32}/(?<secret>[a-z0-9]{32})", RegexOptions.Compiled),
                 new Regex(@"getnzb.*?(?<=\?|&)(r)=(?<secret>[^&=]+?)(?= |&|$)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
-                new Regex(@"(?<=[?& ;])[^=]*?(_?(?<!use|get_)token|username|passwo?rd)=(?<secret>[^&=]+?)(?= |&|$|;)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
+                new Regex(@"\b[^=]*?(_?(?<!use|get_)token|username|passwo?rd)=(?<secret>[^&=]+?)(?= |&|$|;)", RegexOptions.Compiled | RegexOptions.IgnoreCase),
 
                 // Trackers Announce Keys; Designed for Qbit Json; should work for all in theory
                 new Regex(@"announce(\.php)?(/|%2f|%3fpasskey%3d)(?<secret>[a-z0-9]{16,})|(?<secret>[a-z0-9]{16,})(/|%2f)announce"),