Summary: Gcc-3.3 tidyups.

Summary: Gcc-3.3 tidyups.
Keywords:

* Gave lib/ the same AM CXX and CFLAGS as src/
* In mempool, extract method on the free cache cleanup, and use a more correct type for Free, to avoid a warning on our use of 'type punned' pointers.
* Make squid_rn_inithead typesafe, and adjust usage throughout.
* rfc1738_do_escape needed adjustment for the use of char comparison with 0xFF.
* Make ACL Request/Reply HeaderStrategy singleton instance variable a pointer rather than instance to allow for stricter scoping rules.
* VectorMap<Key,Value>::indexUsed (unsigned char const index) had a tautology assert.