ignore this impossible-to-fix error

also link to a twisted bug report for making it possible

src/allmydata/test/common.py

@@ -323,7 +323,7 @@ class AdoptedServerPort(object):
     """
     prefix = "adopt-socket"
 
-    def parseStreamServer(self, reactor, fd):
+    def parseStreamServer(self, reactor, fd): # type: ignore # https://twistedmatrix.com/trac/ticket/10134
         log.msg("Adopting {}".format(fd))
         # AdoptedStreamServerEndpoint wants to own the file descriptor.  It
         # will duplicate it and then close the one we pass in.  This means it