Add toString() for PackConfig

This is helpful for writing the pack configuration into a log file.

Change-Id: I5e7f5ff7e01c9538ca12a1860844ba9b467bdf05
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

org.eclipse.jgit/src/org/eclipse/jgit/storage/pack/PackConfig.java

@@ -685,4 +685,22 @@ public class PackConfig {
 				"pack", "deltacompression", isDeltaCompress())); //$NON-NLS-1$ //$NON-NLS-2$
 		setBuildBitmaps(rc.getBoolean("pack", "buildbitmaps", isBuildBitmaps())); //$NON-NLS-1$ //$NON-NLS-2$
 	}
+
+	public String toString() {
+		final StringBuilder b = new StringBuilder();
+		b.append("maxDeltaDepth=").append(getMaxDeltaDepth()); //$NON-NLS-1$
+		b.append("deltaSearchWindowSize=").append(getDeltaSearchWindowSize()); //$NON-NLS-1$
+		b.append("deltaSearchMemoryLimit=").append(getDeltaSearchMemoryLimit()); //$NON-NLS-1$
+		b.append("deltaCacheSize=").append(getDeltaCacheSize()); //$NON-NLS-1$
+		b.append("deltaCacheLimit=").append(getDeltaCacheLimit()); //$NON-NLS-1$
+		b.append("compressionLevel=").append(getCompressionLevel()); //$NON-NLS-1$
+		b.append("indexVersion=").append(getIndexVersion()); //$NON-NLS-1$
+		b.append("bigFileThreshold=").append(getBigFileThreshold()); //$NON-NLS-1$
+		b.append("threads=").append(getThreads()); //$NON-NLS-1$
+		b.append("reuseDeltas=").append(isReuseDeltas()); //$NON-NLS-1$
+		b.append("reuseObjects=").append(isReuseObjects()); //$NON-NLS-1$
+		b.append("deltaCompress=").append(isDeltaCompress()); //$NON-NLS-1$
+		b.append("buildBitmaps=").append(isBuildBitmaps()); //$NON-NLS-1$
+		return b.toString();
+	}
 }