Move size class table to man page.

Move the table of size classes from jemalloc.c to the manual page.  When
manually formatting the manual page, it is now necessary to use:

    nroff -man -t jemalloc.3

jemalloc/doc/jemalloc.3.in

@@ -564,8 +564,8 @@ However, it may make sense to reduce the number of arenas if an application
 does not make much use of the allocation functions.
 .Pp
 @roff_tcache@In addition to multiple arenas, this allocator supports
-@roff_tcache@thread-specific caching for small objects, in order to make it
-@roff_tcache@possible to completely avoid synchronization for most small
+@roff_tcache@thread-specific caching for small and large objects, in order to
+@roff_tcache@make it possible to completely avoid synchronization for most small
 @roff_tcache@allocation requests.
 @roff_tcache@Such caching allows very fast allocation in the common case, but it
 @roff_tcache@increases memory usage and fragmentation, since a bounded number of
@@ -619,6 +619,64 @@ option), are rounded up to the nearest run size.
 Allocation requests that are too large to fit in an arena-managed chunk are
 rounded up to the nearest multiple of the chunk size.
 .Pp
+Assuming 4 MiB chunks, 4 KiB pages, and a 16 byte quantum on a 64-bit system,
+the size classes in each category are as follows:
+.TS
+expand allbox tab(;);
+LLR
+LLR
+^LR
+^^R
+^^R
+^^R
+^^R
+^LR
+^^R
+^^R
+^^R
+^^R
+^LR
+^^R
+^^R
+^^R
+^^R
+LsR
+^^R
+^^R
+^^R
+^^R
+LsR
+^^R
+^^R
+^^R.
+Category;Subcategory;Size
+Small;Tiny;8
+;Quantum-spaced;16
+;;32
+;;48
+;;...
+;;128
+;Cacheline-spaced;192
+;;256
+;;320
+;;...
+;;512
+;Sub-page;760
+;;1024
+;;1280
+;;...
+;;3840
+Large;4 KiB
+;;8 KiB
+;;12 KiB
+;;...
+;;4084 KiB
+Huge;4 MiB
+;;8 MiB
+;;12 MiB
+;;...
+.TE
+.Pp
 Allocations are packed tightly together, which can be an issue for
 multi-threaded applications.
 If you need to assure that allocations do not suffer from cacheline sharing,