UnknownFormatConversionException in start.jar --debug if path has % sign

[joakime]

Jetty version(s)
12.0.0

Java version/vendor (use: java -version)
17.0.5

OS type/version
Linux

Description
If a scanned directory for the jetty.base has a percent sign, and debug is enabled, it can result in an java.util.UnknownFormatConversionException

Example: create a base directory called foo%bar and do the following

$ mkdir foo%bar
$ cd foo%bar
$ java -jar /path/to/jetty-home-12.0.0.jar --add-modules=http,core-deploy
$ java -jar /path/to/jetty-home-12.0.0.jar --debug --list-config

 java.util.UnknownFormatConversionException: Conversion = 'b'
 	at java.base/java.util.Formatter$FormatSpecifier.conversion(Formatter.java:2855)
 	at java.base/java.util.Formatter$FormatSpecifier.<init>(Formatter.java:2891)
 	at java.base/java.util.Formatter.parse(Formatter.java:2747)
 	at java.base/java.util.Formatter.format(Formatter.java:2671)
 	at java.base/java.io.PrintStream.format(PrintStream.java:1209)
 	at java.base/java.io.PrintStream.printf(PrintStream.java:1105)
 	at org.eclipse.jetty.start.StartLog.outLog(StartLog.java:44)
 	at org.eclipse.jetty.start.StartLog.debug(StartLog.java:51)
 	at org.eclipse.jetty.start.PathFinder.addHit(PathFinder.java:45)
 	at org.eclipse.jetty.start.PathFinder.preVisitDirectory(PathFinder.java:82)
 	at org.eclipse.jetty.start.PathFinder.preVisitDirectory(PathFinder.java:31)
 	at java.base/java.nio.file.Files.walkFileTree(Files.java:2817)
 	at org.eclipse.jetty.start.BaseHome.getPaths(BaseHome.java:374)
 	at org.eclipse.jetty.start.StartArgs.expandModules(StartArgs.java:435)
 	at org.eclipse.jetty.start.StartArgs.expandEnvironments(StartArgs.java:216)
 	at org.eclipse.jetty.start.Main.processCommandLine(Main.java:375)
 	at org.eclipse.jetty.start.Main.main(Main.java:74)
 
 Usage: java -jar $JETTY_HOME/start.jar [options] [properties] [configs]
        java -jar $JETTY_HOME/start.jar --help  # for more information

This is due to a bad usage of the StartLog.debug() method.

[joakime]

Merged PR #10214