Make the "SLAB_ALLOC()" and "SLAB_FREE()" macros take the type of the

Make the "SLAB_ALLOC()" and "SLAB_FREE()" macros take the type of the
object being allocated, rather than the name of the free list, as an
argument (with the name of the free list constructed from the name of
the type), and add macros to define and declare the free list, also
taking the type of the object being allocated.

git-svn-id: http://anonsvn.wireshark.org/wireshark/trunk@11305 f5534014-38df-0310-8fa8-9805f1628bb7