i2psnark standalone: Add notes about changing browser and port

apps/i2psnark/i2psnark-appctx.config

@@ -2,3 +2,7 @@
 # This is for app context configuration of standalone i2psnark.
 # Almost all configuration settings are in i2psnark.config.d/i2psnark.config
 #
+# disable browser launch on startup
+#routerconsole.browser=/bin/false
+# change browser
+#routerconsole.browser=firefox

apps/i2psnark/readme-standalone.txt

@@ -4,6 +4,10 @@ java -jar i2psnark.jar
 
 I2PSnark web ui will be at http://127.0.0.1:8002/i2psnark/ 
 
+To change or disable browser launch at startup, edit i2psnark-appctx.config.
+To change the port, edit jetty-i2psnark.xml.
+
+
 I2PSnark is GPL'ed software, based on Snark (http://www.klomp.org/) to run on top of I2P
 (https://geti2p.net/) within a webserver (such as the bundled Jetty from
 https://www.eclipse.org/jetty/).  For more information about I2PSnark, get in touch