Base URL in Trusted Applications page accepts illegal characters

Steps to replicate:

1. Navigate to the View Trusted Applications page ( http://localhost:8080/secure/admin/trustedapps/ViewTrustedApplications.jspa ).
2. In the Base URL enter the URL string e.g http://Gurleen:8080/confluence.
3. At the beginning or end of the string add for e.g a space character.
4. Hit Send Request.
   On sent the following stack trace is produced:

     Cause:
   java.lang.RuntimeException: java.net.URISyntaxException: Illegal character in scheme name at index 0: http://Gurleen:8080/confluence
   
   Stack Trace: [hide]
   
   java.lang.RuntimeException: java.net.URISyntaxException: Illegal character in scheme name at index 0:  http://Gurleen:8080/confluence  
   	at com.atlassian.jira.web.action.admin.trustedapps.ViewTrustedApplications.requestTrustedApplication(ViewTrustedApplications.java:131)
   	at com.atlassian.jira.web.action.admin.trustedapps.ViewTrustedApplications.doRequest(ViewTrustedApplications.java:77)
   	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   	at java.lang.reflect.Method.invoke(Method.java:597)
   	at webwork.util.InjectionUtils$DefaultInjectionImpl.invoke(InjectionUtils.java:61)
   	at webwork.util.InjectionUtils.invoke(InjectionUtils.java:52)
   	at webwork.action.ActionSupport.invokeCommand(ActionSupport.java:417)
   	at webwork.action.ActionSupport.execute(ActionSupport.java:146)
   	at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:54)
   	at webwork.dispatcher.GenericDispatcher.executeAction(GenericDispatcher.java:132)
   	at com.atlassian.jira.web.dispatcher.JiraServletDispatcher.service(JiraServletDispatcher.java:178)
   	at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.jira.web.filters.AccessLogFilter.doFilter(AccessLogFilter.java:73)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:119)
   	at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:55)
   	at com.atlassian.jira.web.filters.SitemeshExcludePathFilter.doFilter(SitemeshExcludePathFilter.java:38)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:192)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.seraph.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:120)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:125)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.util.profiling.filters.ProfilingFilter.doFilter(ProfilingFilter.java:132)
   	at com.atlassian.jira.web.filters.JIRAProfilingFilter.doFilter(JIRAProfilingFilter.java:16)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.jira.web.filters.ActionCleanupDelayFilter.doFilter(ActionCleanupDelayFilter.java:43)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.jira.web.filters.RequestCleanupFilter.doFilter(RequestCleanupFilter.java:50)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:72)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:350)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.gzipfilter.GzipFilter.doFilter(GzipFilter.java:79)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.core.filters.AbstractEncodingFilter.doFilter(AbstractEncodingFilter.java:33)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at com.atlassian.jira.appconsistency.db.DatabaseCompatibilityEnforcerFilter.doFilter(DatabaseCompatibilityEnforcerFilter.java:39)
   	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:215)
   	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
   	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
   	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
   	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
   	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
   	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:548)
   	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:174)
   	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:874)
   	at org.apache.coyote.http11.Http11BaseProtocol$Http11ConnectionHandler.processConnection(Http11BaseProtocol.java:665)
   	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:528)
   	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:81)
   	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:689)
   	at java.lang.Thread.run(Thread.java:619)
   Caused by: java.net.URISyntaxException: Illegal character in scheme name at index 0:  http://Gurleen:8080/confluence  
   	at java.net.URI$Parser.fail(URI.java:2809)
   	at java.net.URI$Parser.checkChars(URI.java:2982)
   	at java.net.URI$Parser.checkChar(URI.java:2992)
   	at java.net.URI$Parser.parse(URI.java:3008)
   	at java.net.URI.<init>(URI.java:578)
   	at com.atlassian.jira.web.action.admin.trustedapps.ViewTrustedApplications.requestTrustedApplication(ViewTrustedApplications.java:126)
   	... 70 more