move footnote to footnotes section

README.rst

@@ -172,14 +172,6 @@ libmc is friendly to gevent. Read ``tests/shabby/gevent_issue.py`` for
 details. ``libmc.ThreadedClient`` and ``libmc.ClientPool`` are not compatible.
 [#]_
 
-.. [#] In order to use a single executable for multiple greenlet contexts,
- gevent has to `copy thread memory
- <https://github.com/python-greenlet/greenlet/blob/937f150e07823ee03344aeeb5111c0bb371a831d/src/greenlet/greenlet.cpp#L105>`__
- to and from the same stack space. This doesn't affect Python references,
- which are handed off through gevent, but makes it impossible for shared
- libraries to pass memory addresses across greenlets, which is required for
- the worker pool.
-
 **Notice:**
 
 ``gevent.monkey.patch_all()`` will override
@@ -239,6 +231,18 @@ Documentation
 
 https://github.com/douban/libmc/wiki
 
+Footnotes
+---------
+
+.. [#] In order to use a single executable for multiple greenlet contexts,
+ gevent has to `copy thread memory
+ <https://github.com/python-greenlet/greenlet/blob/937f150e07823ee03344aeeb5111c0bb371a831d/src/greenlet/greenlet.cpp#L105>`__
+ to and from the same stack space. This doesn't affect Python references,
+ which are handed off through gevent, but makes it impossible for shared
+ libraries to pass memory addresses across greenlets, which is required for
+ the worker pool.
+
+
 LICENSE
 -------