Add CLI SOCKS5 proxy support (#447)

* Add CLI SOCKS5 proxy support: --proxy ip:port:user:pass | ip:port

* Add more argument checks

Ensures there wont be an array out of bounds exception.

* Update RuneLite.java

checkstyle fix

* Update RuneLiteProperties.java

checkstyle fix

runelite-client/src/main/java/net/runelite/client/RuneLite.java

@@ -33,6 +33,8 @@ import com.google.inject.Injector;
 import java.io.File;
 import java.lang.management.ManagementFactory;
 import java.lang.management.RuntimeMXBean;
+import java.net.Authenticator;
+import java.net.PasswordAuthentication;
 import java.util.Locale;
 import javax.annotation.Nullable;
 import javax.inject.Provider;
@@ -182,6 +184,10 @@ public class RuneLite
 		parser.accepts("debug", "Show extra debugging output");
 		parser.accepts("no-splash", "Do not show the splash screen");
 
+		final ArgumentAcceptingOptionSpec<String> proxyInfo = parser
+			.accepts("proxy")
+			.withRequiredArg().ofType(String.class);
+
 		final ArgumentAcceptingOptionSpec<ClientUpdateCheckMode> updateMode = parser
 			.accepts("rs", "Select client type")
 			.withRequiredArg()
@@ -199,6 +205,36 @@ public class RuneLite
 		parser.accepts("help", "Show this text").forHelp();
 		OptionSet options = parser.parse(args);
 
+		if (options.has("proxy"))
+		{
+			String[] proxy = options.valueOf(proxyInfo).split(":");
+			
+			if (proxy.length >= 2)
+			{
+				System.setProperty("socksProxyHost", proxy[0]);
+				System.setProperty("socksProxyPort", proxy[1]);
+			}
+
+			if (proxy.length >= 4)
+			{
+				System.setProperty("java.net.socks.username", proxy[2]);
+				System.setProperty("java.net.socks.password", proxy[3]);
+
+				final String user = proxy[2];
+				final char[] pass = proxy[3].toCharArray();
+
+				Authenticator.setDefault(new Authenticator()
+				{
+					private PasswordAuthentication auth = new PasswordAuthentication(user, pass);
+
+					protected PasswordAuthentication getPasswordAuthentication()
+					{
+						return auth;
+					}
+				});
+			}
+		}
+
 		if (options.has("help"))
 		{
 			parser.printHelpOn(System.out);

runelite-client/src/main/java/net/runelite/client/RuneLiteProperties.java

@@ -65,7 +65,13 @@ public class RuneLiteProperties
 
 	public String getTitle()
 	{
-		return properties.getProperty(RUNELITE_TITLE);
+		final StringBuilder sb = new StringBuilder(properties.getProperty(RUNELITE_TITLE));
+		String proxy;
+		if ((proxy = System.getProperty("socksProxyHost")) != null)
+		{
+			sb.append(String.format(" (%s)", proxy));
+		}
+		return sb.toString();
 	}
 
 	public String getVersion()