FEATURE: Support key + timestamp lookup via LocalResourceIndex
If enabled via timestampSearch flag, the key passed to SearchResultSource is
<canon url><space><replay timestamp> rather than just <canon url>
Currently, the timestamp search is used for non-html lookups
(so img, css, js, fr contexts only)

ZiplinesSearchResult back in use, supports url+timestamp binary search
(while matching url prefix still) and will return only 1 closest match back

FEATURE: ZipLinesSearchResult supports block line dedup by timestamp
via the timestampDedupLength field. If >0, then if the next block line matches
url+timestamp by timestampDedupLength characters, it is skipped.

FIX: Timestamp optimization using StringBuilder

FIX: AccessPoint adaptive redirect limits revisit failure retries to 2 times
(to be made adjustable)