store properties on startup

core/src/main/groovy/com/muwire/core/Core.groovy

@@ -48,11 +48,14 @@ class Core {
 			propsFile.withInputStream {
 				props.load(it)
 			}
-		} else
+			props = new MuWireSettings(props)
+		} else {
 			log.info("creating default properties")
-		
-		props = new MuWireSettings(props)
-		
+            props = new MuWireSettings()
+            propsFile.withOutputStream { 
+                props.write(it)
+            }
+		}
 		
 		log.info("initializing I2P socket manager")
 		def i2pClient = new I2PClientFactory().createClient()

core/src/main/groovy/com/muwire/core/MuWireSettings.groovy

@@ -4,7 +4,14 @@ import com.muwire.core.hostcache.CrawlerResponse
 
 class MuWireSettings {
 	
-	MuWireSettings() {}
+    final boolean isLeaf
+    boolean allowUntrusted
+    String nickname
+    CrawlerResponse crawlerResponse
+    
+	MuWireSettings() {
+        this(new Properties())
+    }
 	
 	MuWireSettings(Properties props) {
 		isLeaf = Boolean.valueOf(props.get("leaf","false"))
@@ -13,10 +20,14 @@ class MuWireSettings {
         nickname = props.getProperty("nickname","MuWireUser")
 	}
     
-	final boolean isLeaf
-	boolean allowUntrusted
-    String nickname
-	CrawlerResponse crawlerResponse
+    void write(OutputStream out) throws IOException {
+        Properties props = new Properties()
+        props.setProperty("leaf", isLeaf.toString())
+        props.setProperty("allowUntrusted", allowUntrusted.toString())
+        props.setProperty("crawlerResponse", crawlerResponse.toString())
+        props.setProperty("nickname", nickname)
+        props.store(out, "")
+    }
 
 	boolean isLeaf() {
 		isLeaf