(#3436) Fix concurrency problem in curl exposed by batching updates.
(#3436) Fix concurrency problem in curl exposed by batching updates.

djw8605/htcondor,neurodebian/htcondor,htcondor/htcondor,djw8605/htcondor,htcondor/htcondor,neurodebian/htcondor,djw8605/htcondor,djw8605/htcondor,neurodebian/htcondor,htcondor/htcondor,htcondor/htcondor,zhangzhehust/htcondor,djw8605/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,neurodebian/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,htcondor/htcondor,htcondor/htcondor,zhangzhehust/htcondor,djw8605/htcondor,zhangzhehust/htcondor,djw8605/htcondor,djw8605/htcondor,zhangzhehust/htcondor,htcondor/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,htcondor/htcondor,djw8605/htcondor