hgweb: use the given revision in the name of the archive

If you ask for an archive in hgweb by tagname the directory in the archive
should include the tagname not the changeset-id.

mercurial/hgweb/hgweb_mod.py

@@ -606,9 +606,13 b' class hgweb(object):'
         'zip': ('application/zip', 'zip', '.zip', None),
         }
 
-    def archive(self, req, cnode, type_):
+    def archive(self, req, id, type_):
         reponame = re.sub(r"\W+", "-", os.path.basename(self.reponame))
-        name = "%s-%s" % (reponame, short(cnode))
+        cnode = self.repo.lookup(id)
+        arch_version = id
+        if cnode == id:
+            arch_version = short(cnode)
+        name = "%s-%s" % (reponame, arch_version)
         mimetype, artype, extension, encoding = self.archive_specs[type_]
         headers = [('Content-type', mimetype),
                    ('Content-disposition', 'attachment; filename=%s%s' %
@@ -989,12 +993,11 b' class hgweb(object):'
         req.write(z.flush())
 
     def do_archive(self, req):
-        changeset = self.repo.lookup(req.form['node'][0])
         type_ = req.form['type'][0]
         allowed = self.configlist("web", "allow_archive")
         if (type_ in self.archives and (type_ in allowed or
             self.configbool("web", "allow" + type_, False))):
-            self.archive(req, changeset, type_)
+            self.archive(req, req.form['node'][0], type_)
             return
 
         req.write(self.t("error"))