Jun Wu <quark@fb.com> [Thu, 09 Mar 2017 15:10:27 -0800] rev 31288
localrepo: rename proxycls to filteredrepo
When debugging in a Python shell, the type of "repo" is "proxycls", which
could confuse new people.
In [1]: repo
Out[1]: <mercurial.localrepo.proxycls at 0x7f65d4b976d0>
Let's rename it to "filteredrepo" to make it clearer.