EnvironmentLoaderListener crashes if custom filters are configured.

Custom filters are initialized in init method of IniShiroFilter. EnvironmentLoaderListener runs before filters and is unable to access custom filters.

How to reproduce it: define and use custom filter in Shiro.ini of samples-web application:

[main]
shiro.loginUrl = /login.jsp

1. create custom filter
   filter=org.apache.shiro.web.filter.authc.FormAuthenticationFilter

...

[urls]

1. Use custom filter defined above
   /login.jsp = filter
   /logout = logout
   /account/** = filter
   /remoting/** = filter, roles[b2bClient], perms["remote:invoke:lan,wan"]
   /** = filter

Exception thrown on application start-up:

java.lang.IllegalArgumentException: There is no filter with name 'filter' to apply to chain [/login.jsp] in the pool of available Filters. Ensure a filter with that name/path has first been registered with the addFilter method(s).
at org.apache.shiro.web.filter.mgt.DefaultFilterChainManager.addToChain(DefaultFilterChainManager.java:185)
at org.apache.shiro.web.filter.mgt.DefaultFilterChainManager.createChain(DefaultFilterChainManager.java:158)
at org.apache.shiro.web.config.IniFilterChainResolverFactory.createChains(IniFilterChainResolverFactory.java:186)
at org.apache.shiro.web.config.IniFilterChainResolverFactory.buildChains(IniFilterChainResolverFactory.java:127)
at org.apache.shiro.web.config.IniFilterChainResolverFactory.createInstance(IniFilterChainResolverFactory.java:80)
at org.apache.shiro.web.config.IniFilterChainResolverFactory.createInstance(IniFilterChainResolverFactory.java:1)
at org.apache.shiro.config.IniFactorySupport.createInstance(IniFactorySupport.java:123)
at org.apache.shiro.util.AbstractFactory.getInstance(AbstractFactory.java:47)
at org.apache.shiro.web.env.IniWebEnvironment.createFilterChainResolver(IniWebEnvironment.java:187)
at org.apache.shiro.web.env.IniWebEnvironment.configure(IniWebEnvironment.java:102)
at org.apache.shiro.web.env.IniWebEnvironment.init(IniWebEnvironment.java:92)
at org.apache.shiro.util.LifecycleUtils.init(LifecycleUtils.java:45)
at org.apache.shiro.util.LifecycleUtils.init(LifecycleUtils.java:40)
at org.apache.shiro.web.env.EnvironmentLoader.createEnvironment(EnvironmentLoader.java:226)
at org.apache.shiro.web.env.EnvironmentLoader.initEnvironment(EnvironmentLoader.java:138)
at org.apache.shiro.web.env.EnvironmentLoaderListener.contextInitialized(EnvironmentLoaderListener.java:58)
at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:548)
at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1250)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:517)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:467)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
at org.mortbay.jetty.Server.doStart(Server.java:224)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:50)
at org.apache.shiro.test.AbstractContainerTest.startContainer(AbstractContainerTest.java:47)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)