hgweb: move additional state setting outside of refresh

We want refresh() to only be about refreshing repository
instances. This state doesn't belong in requestcontext
because it is shared across multiple threads.

mercurial/hgweb/hgweb_mod.py

@@ -195,7 +195,7 class hgweb(object):
         else:
             return repo.filtered('served')
 
-    def refresh(self, request):
+    def refresh(self):
         repostate = []
         # file of interrests mtime and size
         for meth, fname in foi:
@@ -208,15 +208,11 class hgweb(object):
         if repostate != self.repostate:
             r = hg.repository(self.repo.baseui, self.repo.url())
             self.repo = self._getview(r)
-            encoding.encoding = self.config("web", "encoding",
-                                            encoding.encoding)
             # update these last to avoid threads seeing empty settings
             self.repostate = repostate
             # mtime is needed for ETag
             self.mtime = st.st_mtime
 
-        self.repo.ui.environ = request.env
-
     def run(self):
         """Start a server from CGI environment.
 
@@ -243,9 +239,13 class hgweb(object):
         This is typically only called by Mercurial. External consumers
         should be using instances of this class as the WSGI application.
         """
-        self.refresh(req)
+        self.refresh()
         rctx = requestcontext(self)
 
+        # This state is global across all threads.
+        encoding.encoding = rctx.config('web', 'encoding', encoding.encoding)
+        rctx.repo.ui.environ = req.env
+
         # work with CGI variables to create coherent structure
         # use SCRIPT_NAME, PATH_INFO and QUERY_STRING as well as our REPO_NAME