FEATURE: RemoteLiveWebCache can perform normal HTTP GET requests with requestPrefix path, instead of as proxy request.
Should support http and https. If no protocol is specified, will default to http
FEATURE: ZipNumClusterSearchResultSource supports timestamp dedup given a specified length (default to off/0)
Main use case: 10 (one capture per hour).

FEATURE: Warc header, Perf header and Error headers are off by default but enablable via spring config
    <property name="enableErrorMsgHeader" value="true"/>
    <property name="enablePerfStatsHeader" value="true"/>
    <property name="enableWarcFileHeader" value="true"/>

header defaults, also customizable, are:

	errorMsgHeader = "X-Archive-Wayback-Runtime-Error"
	perfStatsHeader = "X-Archive-Wayback-Perf";
	warcFileHeader = "x-archive-src";

FIX: PerfStats output omits unused perf entries (0 calls  and 0 total)