Introduced experimental strblob class to more efficiently handle Cache-Control header...

Introduced experimental strblob class to more efficiently handle Cache-Control header lookups
Various performance improvements.
Renamed HttpHdrCc::parseInit() to parse()
Reverted some changes in HTtpHdrCc::parse() to facilitate review.
Removed useless HttpHdrCc::setSMaxAge
Removed Author attribution - too many authors to single any one out
Removed parametric HttpHdrCc constructor, made parametric.
Removed duplicate mempool definition