Merge of SBuf (formerly known as String class) begun

Hi all,
   I've branched off trunk to start merging the work we've extensively
discussed in the past month into Squid.

The feature branch is at https://code.launchpad.net/~kinkie/squid/stringng
The previous codebase at lp:~kinkie/squid/string-ng-sandbox remains
mostly as a changelog placeholder; its outcome has been placed in
include/SBuf.h (to be split into .cc and .cci); I'll update the
blueprint at http://wiki.squid-cache.org/Features/BetterStringBuffer
Real Soon Now (tm).

-- 
 /kinkie