Change part of URI, http port and pool

If the request URI starts with /solr but does not contain /core1, then it will issue an immediate redirect to the new modified URI. This is a 302 response back to the client telling it to go to a new URL. On the subsequent to /solr/core1, and for any request that contains /core1 in the URI, it'll pass over the if and follow the code in the else condition - which is to add the port number to the end of the Host header. Traffic will flow to the port 8080 pool members by virtue of the pool assigned to the VIP itself.