[DRE-maint] Bug#834686: ruby-httpclient: FTBFS randomly (failing tests)

[Santiago Vila]

retitle 834686 ruby-httpclient: FTBFS randomly (failing tests)
thanks

[ I'm changing the subject because I never liked the old wording ].

If you try to reproduce this, please try a lot of times. After
building this package 100 times today, the failure rate is about 20%.
(Using sbuild on a single CPU QEMU/KVM virtual machine).

Thanks.