Update public-suffix.txt.

Also, created a mscript to simplify doing this in the future.

src/main/java/com/laytonsmith/core/Static.java

@@ -1258,7 +1258,10 @@ public static String GetStacktraceString(Throwable t) {
 	 *
 	 * This generally condenses a 5 or 6 line operation into 1 line.
 	 *
-	 * @param arg
+	 * @param arg The path to parse. May be null.
+	 * @param env The environment, required to properly resolve relative paths.
+	 * @param t Code target, for errors.
+	 * @param def The default file, which is returned if {@code arg} is null. (Maybe also be null).
 	 * @return
 	 */
 	public static File GetFileFromArgument(String arg, Environment env, Target t, File def) throws ConfigRuntimeException {

src/main/java/com/laytonsmith/core/functions/Web.java

@@ -391,7 +391,7 @@ public Mixed exec(final Target t, final Environment environment, Mixed... args)
 						settings.setDownloadTo(null);
 					} else { // TODO: Remove this check and tie into the VFS once that is complete.
 						if(Static.InCmdLine(environment)) {
-							File file = new File(download.val());
+							File file = Static.GetFileFromArgument(Construct.nval(download), environment, t, null);
 							if(!file.isAbsolute()) {
 								file = new File(t.file(), file.getPath());
 							}