talloc | add support for static talloc pool caches

talloc is a C library. talloc has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

talloc is a hierarchical, reference counted memory pool system with destructors. it is the core memory allocator used in samba. its an extremely cool wrapper over malloc that allows you to organize your memory contexts in a more seamless way without bothering about freeing embedded pointer contexts within nested structs which can easily lead to leaks. with talloc you can easily embed all allocations into a parent context and just free the parent context which would automatically free the embedded nested pointers. the jumpstart with talloc, first refer to some sample code usage at: you can also refer to the torture tests of talloc in testsuite.c for api usage. additionally i have a simpler usage example that covers some important talloc usage in: talloc_test.c. it also has sample usage examples to my newly added talloc static pool apis: talloc_pool_cache, talloc_cache. the existing talloc pools didn't have reclaims and were variable in size and just supported allocating from the pool. reclaims were just decrementing the usage count of the pools but still won't allow the same pool to be used if the pool allocations exhausted