Fixed the way Goutte\Client defined headers are added to Guzzle's request object to allow the overwrite of BrowserKit's Client server headers regardless of case.
Fixed the way Goutte\Client defined headers are added to Guzzle's request object to allow the overwrite of BrowserKit's Client server headers regardless of case.

FriendsOfPHP/Goutte,georaldc/Goutte,trustable/Goutte,viniciusferreira/Goutte,farhan4648gul/Goutte,chrismoulton/Goutte,thewilkybarkid/Goutte,moffe42/Goutte,sitesense/Goutte,ferjflores/Goutte,2upmedia/Goutte,stof/Goutte,jozhao/Goutte