Backport to 1.05.xx URL Rewriter: commons httpclient required for proxy type, but not included

[INFO] [talledLocalContainer] Aug 12, 2015 5:12:02 PM org.apache.catalina.core.StandardWrapperValve invoke
[INFO] [talledLocalContainer] SEVERE: Servlet.service() for servlet [default] in context with path [/site] threw exception [Filter execution threw an exception] with root cause
[INFO] [talledLocalContainer] java.lang.ClassNotFoundException: org.apache.commons.httpclient.HostConfiguration
[INFO] [talledLocalContainer] 	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
[INFO] [talledLocalContainer] 	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
[INFO] [talledLocalContainer] 	at org.tuckey.web.filters.urlrewrite.RequestProxy.execute(RequestProxy.java:102)
[INFO] [talledLocalContainer] 	at org.tuckey.web.filters.urlrewrite.NormalRewrittenUrl.doRewrite(NormalRewrittenUrl.java:277)
[INFO] [talledLocalContainer] 	at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:171)
[INFO] [talledLocalContainer] 	at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
[INFO] [talledLocalContainer] 	at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
[INFO] [talledLocalContainer] 	at org.onehippo.forge.rewriting.HippoRewriteFilter.doFilter(HippoRewriteFilter.java:240)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
[INFO] [talledLocalContainer] 	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
[INFO] [talledLocalContainer] 	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
[INFO] [talledLocalContainer] 	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
[INFO] [talledLocalContainer] 	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
[INFO] [talledLocalContainer] 	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
[INFO] [talledLocalContainer] 	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
[INFO] [talledLocalContainer] 	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
[INFO] [talledLocalContainer] 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
[INFO] [talledLocalContainer] 	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
[INFO] [talledLocalContainer] 	at java.lang.Thread.run(Thread.java:745)