- Added "mem_pools_limit" configuration option. Semantics of

- Added "mem_pools_limit" configuration option. Semantics of
  "mem_pools" option has also changed a bit to reflect new memory
  management policy.
- Reorganized memory pools. Squid now allocates memory in big chunks
  and distributes that memory among "frequently allocated" objects.
- memAllocate() has now only one parameter. Objects are always reset
  with 0s.

- HttpHeader.c: fixed warnings generated by some compilers on member to union
  conversions. Tested using DEC cc only.
- cachmgr.c now tries to interpret strings containing '\t' as table rows and
  format them using html table attributes.