[Bug 48411] New: DDO: Can't login, launcher aborts with "Connection Closed"

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=48411

Bug ID: 48411
           Summary: DDO: Can't login, launcher aborts with "Connection
                    Closed"
           Product: Wine
           Version: 5.0-rc2
          Hardware: x86
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: -unknown
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 66182
  --> https://bugs.winehq.org/attachment.cgi?id=66182
git bisect log

Login works fine on 5.0-rc1 but is broken on 5.0-rc2

Since DDO is from the same company as LOTRO and basically uses the same
launcher, this is probably the same as #48388

By bisecting I tracked down the first bad commit to
b4a1d80ae35d35f5c170e101922bf1563488be18:

diff --git a/server/sock.c b/server/sock.c
index 1a53ce4b09..29542cd01f 100644
--- a/server/sock.c
+++ b/server/sock.c
@@ -1228,7 +1228,7 @@ DECL_HANDLER(set_socket_event)
                                                 FILE_WRITE_ATTRIBUTES,
&sock_ops))) return;
     old_event = sock->event;
     sock->mask    = req->mask;
-    sock->hmask   &= ~req->mask; /* re-enable held events */
+    sock->hmask   &= (FD_WRITE | ~req->mask); /* re-enable held events */
     sock->event   = NULL;
     sock->window  = req->window;
     sock->message = req->msg;