prevent completion of command arguments if command contains colon

proxy/src/main/java/proxy/network/ProxyHandler.java

@@ -423,6 +423,9 @@ public class ProxyHandler implements Handler {
 				System.arraycopy(args, 1, argv, 0, argv.length);
 				list = this.getCompletions(argv);
 			}
+			else if(this.completion.split(" ", -1)[0].indexOf(':') != -1) {
+				list = Lists.newArrayList();
+			}
 		}
 		else {
 			String[] args = this.completion.split(" ", -1);