Auto merge of #4780 - alexcrichton:fix-reset, r=matklad
authorbors <bors@rust-lang.org>
Tue, 5 Dec 2017 15:33:08 +0000 (15:33 +0000)
committerbors <bors@rust-lang.org>
Tue, 5 Dec 2017 15:33:08 +0000 (15:33 +0000)
Reconfigure curl handles after reset

This'll ensure that all our proxy/speed data/etc will be preserved in the
libcurl configuration

Closes #4779


Trivial merge