cherry-pick: 33ebd1f, backward compatibility webpack#359

Author: sokra

lib/Server.js

@@ -142,16 +142,17 @@ function Server(compiler, options) {
 			 	if(!Array.isArray(options.proxy)) {
 					options.proxy = Object.keys(options.proxy).map(function (context) {
 						var proxyOptions;
+						var correctedContext = context.replace(/\/\*$/, "");
 
 						if(typeof options.proxy[context] === 'string') {
 							proxyOptions = {
-								context: context,
+								context: correctedContext,
 								target: options.proxy[target]
 							};
 						}
 						else {
 							proxyOptions = options.proxy[context];
-							proxyOptions.context = context;
+							proxyOptions.context = correctedContext;
 						}
 
 						return proxyOptions;