persist service after first request

We still have the advantage of zero downtime restarts but given this is on the only service on the machine we can just run it all the time

nixpkgs_merge_bot/server.py

@@ -13,17 +13,13 @@ def start_server(settings: Settings) -> None:
         fds = range(3, 3 + int(nfds))
         for fd in fds:
             sock = socket.fromfd(fd, socket.AF_INET, socket.SOCK_STREAM)
-            sock.settimeout(0)
 
-            try:
-                while True:
+            while True:
+                try:
                     GithubWebHook(*sock.accept(), settings)
-            except BlockingIOError:
-                # no more connections
-                pass
-            except OSError:
-                # connection closed
-                pass
+                except OSError:
+                    # connection closed
+                    pass
     else:
         serversocket = socket.socket(socket.AF_INET6, socket.SOCK_STREAM)
         try: