fix: don't use all for socket

---
Merge branch 'cloudflare:main' into fix-socket-perms

Includes-commit: 7a748e7
Includes-commit: fdc2027
Replicated-from: #810

Author: justinrubek

.bleep

@@ -1 +1 @@
-b61399dc39ae098b9245b51884649cde58344e5f
+7aeb492bfa03e2b121b87788e43d755a758c06fb

pingora-core/src/server/transfer_fd/mod.rs

@@ -129,11 +129,11 @@ where
     };
     socket::bind(listen_fd, &unix_addr).unwrap();
 
-    /* sock is created before we change user, need to give permission to all */
+    /* sock is created before we change user, need to give permission */
     stat::fchmodat(
         None,
         path,
-        stat::Mode::all(),
+        stat::Mode::from_bits_truncate(0o666),
         stat::FchmodatFlags::FollowSymlink,
     )
     .unwrap();